A number of Mandurah schools have issued a child protection warning after a young student was approached by a man on Tuesday afternoon.
The incident happened in the Herron/Dawesville area about 3.45pm.
A year 7 boy was travelling home from school by bus when he alighted at the junction of Southern Estuary Road and Hexham Close, Herron.
As the bus pulled away the boy noticed a white utility vehicle similar to a Toyota Hilux behind the bus.
The male driver of the vehicle approached the student and asked if he wanted a lift home.
The boy declined and the man drove away.
The man was described as between 45-55 years old, with tanned skin, a wrinkly brow and a bald head.
He was wearing a gold necklace and had a black dog in the rear seat of his vehicle.
Students have been urged to take care when going to and from school, and to report anything suspicious to parents, school or the police on 131 444.