Five killed in three WA crashes

Five people have died in as many hours in three separate crashes on WA roads.

A 22-year-old motorcyclist died in Pickering Brook around 2pm on Sunday, hitting a power pole shortly after police tried to stop him for speeding.

Around 4.20pm, a 25-year-old female passenger died in a crash on the Mitchell Freeway near Leederville.

The driver, a 24-year-old woman, survived and was taken to hospital.

At 7pm, a 28-year-old man and two female passengers, aged 20 and 31, were killed when their car collided with another vehicle in Yanchep.

A fourth passenger, a 25-year-old woman, was taken to hospital by ambulance in a critical condition.

Two adults and three children in the other car were treated at the scene for minor injuries then taken to hospital for follow-up care.