WASHINGTON (AP) — A call from a student who spotted a man wearing a gun holster on an American University shuttle bus prompted a lockdown of the campus for nearly an hour-and-a-half Wednesday night, police said.

Authorities later determined the man was an off-duty police officer and the lockdown was lifted, Lt. Jesse Porter told a news conference. No weapon was ever displayed, no threats were made, no crime was committed and there were no arrests or injuries, Porter said.