The gunman who killed at least nine people and wounded seven at Umpqua Community College in Roseburg, Ore., has been identified as 26-year-old Chris Harper Mercer, law enforcement sources confirmed to Fox News.

Police have said little about Harper Mercer's background or his motive for the attack.

There is a heavy law enforcement presence outside Harper Mercer's home, and authorities are running his name against terror watch lists, in addition to combing through his email history, phone logs and social media footprint.

According to witnesses, he lined up students in a classroom and asked their religion. Those who answered Christian were shot in the head, while those who answered another religion or did not answer were shot in the legs.

Mercer previously lived in Torrance, California, before moving to Winchester, Oregon, which is near the campus. Neighbors indicate that he often wore camouflage pants, black boots and enjoyed target shootings. reported a neighbor's recollection of Mercer:

Mercer would often "sit by himself in the dark in the balcony with this little light." She added that a woman she believed to be Mercer's mother also lived upstairs and was "crying her eyes out" Thursday.

Harte also told the New York Times Mercer would frequently yell at her for smoking on her apartment's balcony.

"He yelled at us, me and my husband," Harte told the paper. "He was not a friendly type of guy. He did not want anything to do with anyone."

One law enforcement official described the shooter as an "angry young man who was very filled with hate." 

Officials said he was armed with three handguns, a rifle, body armor and had five extra magazines. Police have not said how many of the guns he fired.

A MySpace page in his name contains photos of IRA gunmen and points to support for the organization. 

In an online dating profile, the shooter purportedly identified himself as a "conservative" and a "Republican" and expressed a disdain for organized religion, Daily Beast reported. He also specified that he was in college, lived with his parents and did not drink, smoke or do drugs.

According to CBS News, the shooter wrote a blog post about Vester Flanagan, who fatally shot a Virginia news reporter and a cameraman in August.

"I have noticed that so many people like [Flanagan] are alone and unknown, yet when they spill a little blood, the whole world knows who they are. A man who was known by no one, is now known by everyone. His face splashed across every screen, his name across the lips of every person on the planet, all in the course of one day. Seems like the more people you kill, the more you're in the limelight," the posting stated.

The final post on the blog was Wednesday, an upload of a video documentary about the Sandy Hook shooting.

The shooter's father, Ian Harper, who lives in California, told the Los Angeles Times he was "shocked" but refused to answer questions about his son.

It is unclear whether Mercer was a student at Umpqua. Police have not specified his link to the school or said why they believe he targeted the college. 

The school is described as a "gun free zone" and has only one unarmed security guard, who carries mace. The shooter was taken out by two local police officers who raced to the scene. 

William La Jeunesse reported the latest details this morning (video below.)

Stay tuned to Fox News for the latest developments.

More on the Oregon campus shooting:

Loesch: 'Gun-Free Zones Are Criminal Protection Areas'

O'Reilly Calls Out Obama: Stop 'Politicizing' Oregon Shooting

Obama Speaks Out on Oregon Shooting: 'This Is Something We Should Politicize'

Student Describes Shots, Screaming from Next-Door Classroom