4:15p ET: Click here to see the helicopter photos that confirmed the suspect was hiding in a resident's boat.

11:40a ET: Republican lawmakers push for suspect to be considered enemy combatant

11:31a ET: The Justice Department is preparing to file formal charges against Dzhokhar Tsarnaev today.

11:20a ET: Watch a Watertown man's video of the intense gunfight between police and Dzhokhar Tsarnaev.

10:50a ET: Neil Cavuto just showed us a new image of Dzhokhar Tsarnaev before he was captured. The image shows him climbing over the edge of the boat in which he was found hiding. It’s believed to have been taken from a helicopter overhead.



10:45a ET: The family of 8-year-old bombing victim Martin Richard released a statement thanking officials for collaborating “around the clock to bring the perpetrators of Monday’s attack to justice.” Read the statement here.

10:07a ET: The family of Katherine Russell, wife of Tamerlan Tsarnaev, released a statement reading in part, “We know that we never really knew Tamerlane Tsarnaev.” Read the full statement.

9:05a ET: Eric Shawn reports that the suspect remains in serious condition at Beth Israel Hospital in downtown Boston. He is not able to communicate with police yet, but he is expected to survive. He reportedly has two guns shot wounds--one to the head or neck.  

SATURDAY, 9a ET: We’re seeing new photos from the scene of Friday night’s shootout, including a photo of the boat Tsarnaev was hiding in and a picture of the suspect being captured by police.

11:40p ET: We're seeing images from Boston Common, where a spontaneous celebration began taking place tonight as word spread that "suspect #2" was in police custody.

The city had been in lockdown all day as authorities scoured streets, going door to door in search of 19-year-old Dzhokhar Tsarnaev.

Video showing crowds cheering for law enforcement also aired on the FOX affiliate WFXT after the standoff.

10:12p ET: The following photo of the second suspect, in the back of an ambulance with a bloodied face, is released.

9:58p ET: Police did not read Miranda rights to suspect, instead using a “public safety exemption.” 

9:54p ET: In a Q&A with the press, Col. Alben said that a helicopter using thermal imaging infrared technology was able to detect the suspect in the boat ... the place police finally were able to apprehend Dzhokhar Tsarnaev.

9:49p ET: In remarks at a press conference Friday night, Mass. State Police Superintendent Col. Timothy Alben told reporters that law enforcement is "exhausted ... but we have a victory." Watch highlights from the presser, here.

9:41p ET: President Obama will deliver remarks from the Briefing Room of the White House following the Mass. press conference. 

9:28p ET: The suspect has been taken to Mass General Hospital and is in serious condition, according to police. 

9:15p ET: Crowd cheers at the scene as suspect 2 is captured. Watch the video here

9:05p ET: Police will hold a news conference shortly. Stay tuned to Fox News Channel for live coverage. 

8:58p ET: Boston Police tweeted the following message moments ago, after confirming the second Boston Marathon bombing suspect is in custody.

8:49p ET: Boston Police just tweeted the following, confirming suspect is in custody.

"Suspect in custody. Officers sweeping the area. Stand by for further info."

8:44p ET: WFXT is now reporting that the suspect is in custody and that people are smiling and giving each other thumbs up on the street outside the scene of a tense standoff between the younger bombing suspect and police. 

8:20p ET: New Bedford, MA police had 3 people in custody for questioning who lived in the Rockdale West House Complex, which is an apartment complex often used for rentals for students who attend UMass Dartmouth.  Bombing suspect Dzhokhar Tsarnaev is believed to have resided there at some point.  In addition, there are reports that he was on the UMass Dartmouth campus this week after the Boston attack.

8:00p ET: There are reports that the second suspect was injured in last night’s shootout.

7:50p ET: There are reports of between 8 and 10 new explosions on the scene.

7:47p ET: SWAT team pulled back and a robot is being sent in to check for explosives. 

7:30p ET: WFXT reports the suspect is surrounded by police in a boat. 

A woman reportedly called the police just before 7:00 p.m. ET and said police checked her boat earlier, but the door was open and there was blood.

Multiple eyewitnesses told WFXT they heard 20 to 30 shots fired. The entire neighborhood is said to be on lockdown. The police department in Boston has issued an alert for all Bostonians to "shelter in place," according to Shepard Smith.

7:00p ET: Reports of shots fired in Watertown. Police are responding to the scene.

6:20p ET: In a press conference in Watertown, Mass., Col. Timothy Alben from the Mass. State Police said police have not apprehended the suspect. The stay indoors request for Boston has been lifted. Click here for more from the press conference. 

4:50p ET: FNC's Eric Shawn just reported that the next news conference with officials in Watertown, Mass., will take place at 5:30p ET

4:30p ET: Neil Cavuto just cited a Los Angeles Times article which quotes Tamerlan Tsarnaev as once saying, "I don't have a single American friend. I cannot understand them."

The quote was reportedly part of a photo essay by Tsarnaev which documented his boxing training.

3:36p ET: MIT released a photo of and statement on the death of fallen officer Sean Collier, who died Thursday night after a shootout with the bombing suspects.

The statement read, in part, "He loved us, and we loved him." 

"Sean was one of these guys who really looked at police work as a calling," said MIT Police Chief John DiFava.

"He was born to be a police officer." READ THE STATEMENT.

3:32p ET: Bill Hemmer just reported that an area on Boylston Street at the intersection of Arlington has been cordoned off with metal barricades. Police in an armored vehicle showed up, with military personnel instructing people to not take photos. They then proceeded to go into the T subway station at the location, carrying ammunition.

3:10p ET: The Boston Red Sox just posted an update on tonight's game, saying that the game scheduled to take place at Fenway Park at 7:10pm has been postponed to support efforts of law enforcement officers.

2:45p ET: Tsarnaev’s aunt, Maret, demanded evidence of her nephew’s involvement in the Boston bombing in an impassioned plea to authorities. "All you showed me is a man’s face in a hat standing like this … give me evidence!" See the full interview.

2:14p ET: According to intelligence, Dzhokhar Tsarnaev was granted asylum on September 27, 2002, receiving his green card on June 10, 2004. He was granted citizenship September 11, 2012. Get more details.

2:12p ET: FBI officials have been seen removing items, including a computer, from the West New York, NJ home of one of the suspect's sisters. Watch video.

1:56p ET: Police say they're now searching for a new vehicle possibly connected to the bombings. A BOLO has been issued by the Connecticut State Police for a 1999 Green Honda Civic with the following Mass. license plate numbers: 116 GC7

1:45p ET: Secretary of State John Kerry is expected to make remarks at 2p ET.

1:30p ET: Kurt Schwartz, Director of the Massachusetts Department of Emergency Management, said that taxis are now running in Boston.  He also encourages people who are at work to get in their cars and drive home if they can, as he does not expect people to remain sheltered in businesses.

1:10p ET: Fox News has learned that the FBI is investigating whether anyone else was involved in the terror attack.  A senior source on Capitol Hill, briefed by the National Counterterrorism Center, says that it’s “really important that we take this guy alive.”  The FBI is also investigating whether one or both of the suspects went overseas and whether one or both of them were radicalized in the United States since arriving a decade ago.

12:40p ET: Amtrak has suspended all train service between Boston and New York indefinitely.

12:35p ET: A press conference is finally underway in Boston, with Gov. Patrick and Mayor Menino speaking, as well as Timothy Alben, the Mass. State Police Superintendent.

Alben thanked the community for heeding calls for residents to remain indoors, reiterating that a lockdown is still in place for the city.

"I'll be back here hopefully in an hour," he said, "to give you the next briefing." If anything should develop before that time, Alben said he would move that time up.

Stay tuned to Fox News for the latest updates.

12:18p ET: The Honda CRV that police were looking for has been recovered in Cambridge.

12:06p ET: The uncle of 19-year-old bomb suspect Dzhokhar Tsarnaev gave empassioned remarks on Friday, pleading with his nephew. Watch the video.

11:30a ET: UMass Dartmouth is closed and is in the process of a controlled evacuation of the campus.  This action is in response to information that the Boston Marathon bombing suspect on the loose is a registered student.

11:06a ET: It appears that after the first gunshots were fired near MIT, Dzhokhar Tsarnaev was able to withdraw money from a Watertown Bank of America. According to Mike Tobin, Fox News has learned that at 11:18pm last night, Dzhokhar Tsarnaev dropped by the Bank of America in Watertown Square.

According to MIT's website last night, "At 10:48 PM today, gunshots were reported near Building 32 (Stata) which is currently surrounded by responding agencies." 

10:58a ET: There has been a 30-minute delay in a police presser scheduled to be held on the Boston marathon bombing suspect manhunt.

10:48a ET: Police appear to be on the move in Watertown after a gunshot was heard. Molly Line reports that police were seen putting on their bullet proof vests. It is unclear if they are on their way to another location. 

10:40a ET: Here's a timeline of events in the deadly manhunt for the Boston bombing suspects.

10:33a ET: Moments ago, Boston Police sent out a message indicating that they were seeking a 1999 gray Honda CRV with Massachusetts license plate 316-ES9  saying it was possibly the suspect’s car and should not be approached. The alert went out to Connecticut and New York state police.​

10:23a ET: Police will hold a press briefing in approximately 20 minutes. Tune in to Fox News Channel for live coverage.

10:11a ET: Martha MacCallum just reported that deceased Boston bombing suspect Tamerlan Tsarnaev was intermittently enrolled at Bunker Hill Community College from Fall 2006 to Fall of 2008. Afterwards he enrolled in Mass Bay Community college.

10:04a ET: When the Tamerlan Tsarnaev was brought to Beth Israel Hospital around 1a ET, doctors say he had with various traumatic injuries, and that it looked as though he had been hurt by an explosive device. A  law enforcement source told the Boston Globe that an explosive trigger was found on his body at the morgue. 

9:55a ET: The father of the suspects spoke to the Associated Press, telling them that his younger son is a "true angel." Read more of his statement.

9:41a ET: The MIT police officer killed last night has been identified as Sean Collier, 26, of Somerville. Collier was an MIT police officer since January 2012 and prior to that he was a civilian employee with the Somerville Police Department.  

9:40a ET: Police are near the home of the suspect's uncle in Montgomery Village, Maryland.

9:14a ET: Below is a photo believed to be of 19-year-old Dzhokhar A. Tsarnaev as a younger boy.

9:05a ET: Below is video of the scene in Watertown from last hour during which explosions could be heard coming from a residence surrounded by police. 

A couple was taken out of a residence, which appeared to be nearby the one in question. It was immediately unclear whether or not the explosions were gunfire or another kind of explosive device. The scene has since quieted down, Bill Hemmer pointed out.

8:59a ET: Fox News has confirmed that the suspect killed last night is Tamerlan Tsarnaev, age 26. Suspect #2, Dzhokhar A. Tsarnaev, 19, is still on the loose. 

8:38a ET: Fox News just reported that a woman with dark hair and wearing a red jacket has been brought outside of either the residence being surrounded or of one nearby.

8:35a ET: Fox News is showing live coverage of an active scene in Watertown, Mass. where police have guns drawn outside of a residence. Noises that sound like gunfire or explosions can be heard. Watch here.

8:20a ET: A tweet out from the Boston Police Department reads: "All taxi service in the City of Boston has been suspended pending further notice."

8:10a ET: The law enforcement officer undergoing surgery has been identified as 33-year-old Richard H. Donahue Jr.; he's being treated at Mt Auburn Hospital for injuries sustained in a shootout throughout the night on Thursday.

UPDATE, 8:01a ET: Gov. Deval Patrick addressed the media Friday a.m., telling "all of Boston" to stay indoors and stay alert as a 'massive manhunt' is underway. Comissioner Ed Davis relayed a message from Mayor Menino, reiterating that the "sheter in place" directive is in place for the city.

BREAKING NEWS: One of two suspects in the Boston Marathon bombing is dead, the other on the loose and large parts of the city are on virtual lockdown after a chaotic night of mayhem that included the murder of a Massachusetts Institute of Technology police officer and a shootout with police, authorities said early Friday.

Police believe the two men, believed to be the suspects from Monday's terror attack, are brothers, possibly from Chechnya or Turkey, according to sources who spoke to Fox News. The man on the loose was identified as Dzhokhar A. Tsarnaev, 19, of Cambridge, Mass. They are believed to have been here for 'several years,' sources said.

Schools are closed, train and bus service is suspended and police were telling residents of neighborhoods including Cambridge, Waltham, Watertown, Newton, Arlington and Belmont to stay indoors. Police have formed a wide perimeter and believe the suspect is on foot, armed and dangerous, inside.

The suspects apparently surfaced just hours after the FBI released their imaged late Thursday afternoon, shooting the police officer, robbing a convenience store, carjacking a man who later escaped and engaging in a wild shootout with Boston police, in which they hurled explosives from their stolen car.

Boston Police Commissioner Ed Davis said on Twitter that one of the two suspects was killed and that the at-large suspect, labeled by the FBI as "suspect two" in the marathon bombing, was "armed and dangerous."

Authorities urged residents in Watertown, Newton, Waltham, Belmont, Cambridge and the Allston-Brighton neighborhoods of Boston to stay indoors. All mass transit was shut down.

"We believe this to be a terrorist," Davis said in a press conference. "We believe this to be a man who's come here to kill people. We need to get him in custody."

Read more at FoxNews.com.