Former University of Oregon football star Keanon Lowe said he had just entered a classroom at the Portland high school where he works as a coach and security guard when a student armed with a black shotgun appeared in the doorway.

Lowe had just seconds Friday to react. He lunged at the gunman and wrestled with him for the weapon as other students ran screaming out a back door, Lowe told reporters Monday at a news conference.

Lowe said he managed to get the gun away from the student and pass it to a teacher while Lowe held down the student with his other hand. Lowe wrapped the student in a bear hug until police arrived, he said.

No one was injured. Police are still trying to determine if any shots were fired.