The Arson Squad is investigating a deliberately lit fire at the Mandurah Forum.
A Department of Fire and Emergency Services spokesperson said the centre's automatic alarm system was triggered around 12.58am on Friday.
The fire is understood to have started at the back of Kmart.
It was brought under control by 2am.
A damage bill has been estimated at $100,000.
The cause has been deemed as suspicious.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000.
New mural unveiled at Austin Lakes Baptist College
A new mural has been unveiled at Austin Cove Baptist College.
MARC staff recognised at 2025 Royal Life Saving WA Bravery Awards
Four Mandurah Aquatic and Recreation Centre employees have been recognised at the 2025 Royal Life Saving WA Bravery Awards.
Hefty fines for local fisherman after catching pink snappers out of season
Two fisherman from Waikiki and Armadale have been slapped with hefty fines after catching pink snapper during the season closure.
WATCH: Shocking footage captures youths hanging out of moving car in Secret Harbour, Golden Bay
Shocking footage has emerged of three youths hanging out of a moving car as it travelled through several southern suburbs.
Shire to leave whale carcass to rot on Preston Beach due to cost of removal
A whale carcass that washed up onto Preston Beach will remain there to rot due to the expense of removing it.
10-year-old boy charged over attempted armed robbery in Warnbro
A 10-year-old boy has been charged over two separate incidents in Warnbro.
Dawesville couple charged over alleged cruelty to sick, elderly dog
A Dawesville couple have been charged with animal cruelty offences after allegedly failing to seek vet treatment for their sick, elderly dog.
Homemade shotgun, firearm instruction manuals, OC spray seized from Greenfields home
Firearms, ammunition, OC spray and firearm instruction manuals have been seized from a home in Greenfields as part of a nation-wide operation targeting illicit firearm activity.
2025 Telethon home in Madora Bay sells for record price
The 2025 Telethon home in Madora Bay has sold for a record price.