A search of a library at the University at Buffalo's suburban Amherst campus came up empty after school police received a call of a suspicious person entering the building, possibly with a gun.

University spokesman Joe Brennan says no one was found in the library, which had been evacuated. He says classes will resume on Wednesday.

University police issued the e-mail alert about Lockwood Memorial Library about 4:40 p.m. Tuesday, and announced an hour later that evening classes were canceled.

The library, which is open to the general public, is the largest in the State University of New York system.