Police and firefighters were called to a blaze at Karnet Prison Farm in Keysbrook overnight.
The fire started in a mechanical workshop at the low-security facility around 10pm.
It took fire crews over an hour to extinguish the blaze.
All inmates and prison staff have been accounted for and police say there are no suspicious circumstances.
Women injured in serious North Dandalup crash
Two women have been injured, one seriously, following a crash in North Dandalup.
Daughter of man allegedly stabbed to death in East Rockingham pays tribute to father
The daughter of a man who was allegedly stabbed to death in East Rockingham says she could not have asked for a better father.
Peel Thunder claim fourth WAFL premiership
Peel Thunder are the 2026 WAFL premiers.
Man dies after suspected stabbing in East Rockingham
A 44-year-old man has died in hospital after he was found with stab wounds in East Rockingham.
City of Rockingham cracks down on illegal dumpers
The City of Rockingham are cracking down on people who illegally dump rubbish.
Missing Mandurah girl found safe and well
A missing 13-year-old Mandurah girl has been found safe and well.
Police hunt for man who threatened staff with knife during Falcon armed robbery
Police are hunting a man who threatened staff with a knife during a terrifying armed robbery at a Falcon fast-food outlet.
Authorities descend on Memorial Drive homeless camp, move on notices issued
Authorities have served move on notices to dozens of people sleeping rough on Memorial Drive in Point Peron.
Locals asked to have their say on new concept designs for Lakelands Youth Park
Locals are being asked to have their say on new concept designs for the Lakelands Youth Park.