The gunman, 26-year-old Christopher Harper Mercer, was in possession of at least 13 guns on Thursday, the day he walked into a writing class at Umpqua Community College and killed and injured scores of people. An agent for the Bureau of Alcohol, Tobacco, Firearms and Explosives said six of those guns were found at the college and seven were found at his home, Reuters news agency reported.

At least nine people were killed and seven injured Thursday morning. According to one witness, the gunman asked victims if they were Christian before he shot them.

"Good, because you're a Christian, you're going to see God in just about one second," Mercer told one victim, according to CNN reports.

Mercer served in the US Army for a little more than a month before being discharged in December 2008, Reuters reported.

blc/kms (Reuters, AP)