LINCOLN, Neb. (AP) — The Nebraska Department of Correctional Services says three people have been treated for possible smoke inhalation after a fire broke out in a cell at a Lincoln prison.

A statement from the department says the fire was reported at the Lincoln Correctional Center around 10:05 p.m. Monday.

Battalion Chief Jim Bopp of the Lincoln Fire Department tells the Omaha World-Herald the fire was out of as 11 p.m.

The statement says all inmates in the unit were evacuated. It says as a precaution, two inmates and one staffer were being treated for possible smoke inhalation.

The statement gave no further details, and corrections officials didn’t immediately return messages from The Associated Press.

The fire comes after a disturbance with inmates last month sent nine employees to the hospital.