A gunman opened fire at an Oregon community college Thursday, killing at least 13 people and wounding 20, authorities said.

The shooting happened at Umpqua Community College in Roseburg, about 180 miles south of Portland. The local fire district advised people via Twitter to stay away from the school. Oregon Attorney General Ellen Rosenblum said 13 people are dead. State police Lt. Bill Fugate told KATU-TV that at least 20 others were hurt.

A photographer for the Roseburg News-Review newspaper said he saw people being loaded into multiple ambulances and taken to the local hospital. Andrea Zielinski, a spokeswoman for the Douglas County Sheriff's Office, told The Associated Press: "There's no more threat."