A man has been stabbed inside Rockingham Shopping Centre.
Police and St John Ambulance were called to the scene just outside the Coles entrance around 4pm on Tuesday.
It's understood the man was stabbed when he approached a group of teenagers accused of stealing.
The victim, aged in his 30s, was taken to Royal Perth Hospital in a serious condition.
The teenagers ran from the scene.
Anyone who witnessed the incident, or were in their vehicle or walking around the Read Street area of the shopping centre, and saw three male teenagers running is asked to contact Crime Stoppers by calling 1800 333 000 or by making a report online at crimestopperswa.com.au.
Mandurah woman wanted for questioning over current investigation
Investigation underway into Bunbury sexual assault
Miraculous escape for two men after plane goes down south of Mandurah
Baldivis family left devastated after rescue shelter takes back adopted dog due to breach of contract
Fire crews battle blaze at Baldivis Bunnings
Claims now open for WA student payments
Two people charged over South West murder
Arson Squad to investigate Warnbro house fire