(CNN) -- A female student shot two other women and herself Friday morning inside a classroom on the campus of Louisiana Technical College in Baton Rouge, authorities said.
Baton Rouge police Sgt. Don Kelly said officers responding to a 911 call about 8:30 a.m. found all three already dead in a second-floor classroom.
"There was mass pandemonium, people running," Kelly told The Associated Press. "One officer -- the first into the classroom -- told me he could still smell gunpowder."
The names of the dead were not released.
About 20 people were in the classroom at the time of the shooting, Kelly said. He would not give the room number or say what kind of class it was.
No shots were fired anywhere else, Kelly said.
"It's all self-contained in one classroom," Kelly said. The shooter was not believed to have left the room at any point, he said, and "no other students outside the classroom were in any danger."
Police will interview the other students who were in the classroom to find out why the shooting occurred, Kelly said.