by Erik Ortiz, M. Alex Johnson and Tom Winter
At least 13 people were killed and more than 20 others were injured after a gunman opened fire Thursday morning on the campus of Umpqua Community College in southwest Oregon, authorities told NBC News.
It wasn't immediately known whether the gunman was among the dead after the shooting near Roseburg, which was called in at 10:38 a.m. (1:38 p.m. ET), officials said. State Attorney General Ellen Rosenblum told NBC News simply that he had been "neutralized."
State police said they believed there was only one shooter, who they said "is no longer a threat."
Oregon Gov. Kate Brown was scheduled to brief reporters shortly.
Mercy Medical Center in Roseburg said it was treating nine patients, with three more expected. Sacred Heart General Hospital in Eugene, a major trauma center, told NBC News it was expecting three patients by helicopter.
Students and faculty members were being bused to the Douglas County Fairgrounds.
"I was walking into class, and I heard what sounded like a car backfiring," Courtney Rennie, 23, second-year human services student, told NBC News.
"You don't even think that's somebody shooting a gun," Rennie said, but "I kept envisioning someone is going to come around the corner and and shoot the windows out."
Another Umpqua student, Larry Howell, was on his way to class when he saw students running around him, he told NBC News.
"I turned around. I heard 'active shooter,' and I didn't need to be told twice," he said.
Howell said he checked in with his friends to make sure they were safe.
"Everybody is reaching out to one another and checking on everyone. We don't know which one of our colleagues are down," he said.