MONROE, Wash. (AP) -- An animal that appears to be a bobcat has found its way inside a Washington state prison, and state wildlife officers are at the scene trying to remove it.

Lt. Jose Briones (bree-owns) says a staffer spotted the animal at about 2 a.m. Tuesday on the roof of the special offenders unit of the Monroe Corrections Complex. He says the animal must have climbed a fence or pushed in through some gap in the fence.

The prison called state Fish and Wildlife officers, who are trying to remove the animal, possibly with a tranquilizer gun.

Briones says raccoons have been seen outside the fence before but he knows of no other animals breaking inside.