State Police are seeking the public's help in locating the rifle.

State Police in western New York say they're looking for one of their rifles.

Troopers say the Rock River Arms rifle was last seen early Monday on Buffalo Street near the state police barracks off Interstate 86 in Olean in Cattaraugus County, 60 miles south of Buffalo.

Troopers say the semi-automatic, AR-15-style weapon was in a soft black carrying case.

A news release on the missing gun sent out Tuesday by Troop A didn't mention that the weapon belonged to state police, but troopers later confirmed that the rifle is a state police weapon.

No other details have been released.

State Police are seeking the public's help in locating the rifle.

Troopers say an internal investigation is underway.