More than 120 people have been killed and more than 350 wounded in a series of coordinated terror attacks in Paris.
The attacks prompted French President Francois Hollande to order a state of emergency and the closure of the entire nation's borders.
Police in Belgium made three arrests Saturday at the border in connection with the attacks.
One of the men arrested was a French national, as was one of the eight terrorists who died in the attacks.
Hollande called the attacks an “act of war” and blamed ISIS.
He promised that "France will be merciless towards these barbarians from Daesh," using a derogatory Arab acronym for the Islamic State.
ISIS claimed responsibility for the attacks on an encrypted messaging account, calling them "the first of the storm" and mocking France as a “capital of prostitution and obscenity.”
A Syrian passport was found on the body of a suicide bomber at the Paris stadium.
French authorities are investigating the attacks and urging any witnesses to come forward.
Check the FoxNews.com live blog for the very latest updates.
UPDATE 11:16p ET: Shepard Smith reported that eight attackers were killed, four at the Bataclan concert hall, one on the boulevard outside and three at the soccer stadium, according to new reports.
Shep reported that seven of the eight militants were killed when they detonated suicide vests. The other one was shot by police.
UPDATE 10:32p ET: New reports indicate that more than 200 people are injured, 80 seriously.
UPDATE 9:52p ET: French police have said that they believe all the attackers are dead. They are currently hunting for possible terror accomplices, according to reports.
UPDATE 9:12p ET: The six confirmed locations that were attacked are the Bataclan concert hall, Stade de France stadium, Les Halles shopping mall, La Bell Equipe restaurant, a bar on Rue De Charonne and Le Petit Cambodge restaurant.
UPDATE 8:58p ET: A powerful video posted to Facebook by user Karl Olive shows soccer fans singing the French national anthem, La Marseillaise, as they filed out of the Paris stadium where a terror attack had just occurred.
Dans un tunnel de sortie du Stade de France, sortie dans le calme.... Et la Marseillaise. #fier
Posted by Karl Olive on Friday, November 13, 2015
UPDATE 8:34p ET: Shepard Smith reported that French authorities say that five attackers are dead.
He said that authorities have also confirmed that there were six coordinated attacks across the city.
UPDATE 8:13p ET: Sky News is now reporting that 158 people have been killed.
UPDATE 8:03p ET: Shepard Smith played video of the aftermath of a terror attack at a Paris shopping center, which was posted to social media.
The strike on Forum Des Halles was one of seven coordinated attacks.
UPDATE 7:45p ET: Fox News reported that at least 100 people were killed at the concert hall and 40 elsewhere, bringing the death poll past 140.
UPDATE 7:16p ET: Shepard Smith reported that the French press agency has said that around 100 people are dead at the Bataclan concert hall.
UPDATE 6:59p ET: Shepard Smith reported that French authorities say Paris police have ended their operation to retake a concert hall where at least three gunmen were holding as many as 100 hostages.
Shots had been heard inside the hall before police stormed the facility.
Police reportedly have at least one suspect in custody.
UPDATE 6:27p ET: Geraldo Rivera's daughter, Simone, was at the soccer match and heard the three explosions.
"She didn't see anyone who had been killed or injured, but she saw the emergency teams arriving," Geraldo said.
He said that Simone managed to get out of the stadium and was trying to find a taxi to make it back to her home. (READ MORE)
UPDATE 6:21p ET: Shepard Smith reported that French authorities have confirmed that there were two suicide attacks and a bombing near the country’s main sports stadium
UPDATE 6:13p ET: At least 40 people are dead and 60 injured in the terror attacks, according to French police.
UPDATE 5:59p ET: French President Francois Hollande has declared a state of emergency and closed the country's borders.
He also said that the unprecedented terror attacks are ongoing and encouraged people to stay at home.
UPDATE 5:55p ET: President Obama issued a statement on the Paris terror attacks, saying this is not just an attack on Paris and the French people, but all of humanity.
UPDATE 5:44p ET: Shepard Smith reported authorities have updated the death toll to at least 35.
UPDATE 5:39p ET: Shepard Smith said that Europe 1 radio is reporting that there has been a fourth attack, this one at a shopping mall.
So far, Fox News has confirmed three attacks, at a soccer stadium, concert venue and restaurant.
UPDATE 5:26p ET: Catherine Herridge reported that U.S. intelligence sources are focusing on the simultaneous nature of the attacks, the high-density urban location and the large number of attackers involved.
"This speaks to premeditation. It speaks to coordination," Herridge said.
UPDATE 5:19p ET: Shepard Smith reported that a Vine taken at the France-Germany soccer match captured an explosion that authorities have said was a suicide bombing.
French President Francois Hollande is said to have been evacuated from the stadium.
UPDATE 5:07p ET: Sky News reported that the death toll is now at least 30.
UPDATE 4:59p ET: Shepard Smith reported that the official death toll is now at least 26, according to authorities.
Reports are coming in from Paris on Friday of a shooting at a restaurant and an explosion in a bar near the Stade de France stadium, where a soccer game between France and Germany was in progress.
The Agence France-Presse reported that multiple people have been killed.
Shepard Smith reported that at least 60 people are being held hostage at the Le Bataclan theater, where a rock concert was taking place.