Two teenage boys aged 16 and 17 have died in a crash in Secret Harbour.
Major Crash officers are investigating the crash which happened on Friday night about 7.30 pm.
A silver Toyota Supra Sedan was travelling east on Secret Harbour Boulevard and crashed into a tree.
The 16-year-old boy, sitting in a back seat, and a 17-year-old male in the front passenger seat both received fatal injuries as a result of the crash.
Another 16-year-old boy, who was a rear passenger in the car, received serious injuries and was rushed to Royal Perth Hospital.
The 19-year-old male driver of the car was taken to Royal Perth Hospital where he is in a serious, but stable, condition.
Major Crash investigators are asking anyone who may have seen the vehicle driving in the Secret Harbour area prior to the crash to call Crime Stoppers on 1800 333 000 or make a report online at www.crimestopperswa.com.au.