LINCOLN, Neb. (AP) — What looked like a powerful handgun that prompted a campus warning at the University of Nebraska-Lincoln turned out to be a BB gun.

University of Nebraska-Lincoln police tweeted a warning just after 6 p.m. Sunday about a possible gun sighted near Cather Hall. The campus police followed up 20 minutes later with a tweet that said the situation had been resolved.

Sgt. Jeff Hohlen (HOH’-lehn) said Monday the gun turned out to be a BB-firing replica of a .45-caliber semi-automatic pistol that for years was standard U.S. military issue.

Hohlen says officers following up on the sighting found the replica gun in a bag inside a student’s dorm room. He says the student wasn’t cited but also says the student’s actions would be reviewed by university officials.