A 10-year-old boy has been hit in the head with a rock in Cooloongup.
The boy and his brother were riding to their uncle's house when they were approached by teenagers on a cycle path near Rockingham Train Station around 11.30am on Sunday.
Caleb McAlister told Nine News the offenders demanded they hand over their bikes, before he was hit with a rock.
"Me and my brother got off our bikes because they threatened us to a fight and (they) ditched a rock at my head," he said.
"We gave up our bikes so my brother made sure I didn't get hurt anymore."
Caleb suffered a wound just above his eye.
His mother took him to hospital for treatment.
Anyone with information should contact Crime Stoppers on 1800 333 000.
The boy's bikes were stolen by the offenders. PIC: Facebook
Women injured in serious North Dandalup crash
Daughter of man allegedly stabbed to death in East Rockingham pays tribute to father
Peel Thunder claim fourth WAFL premiership
Man dies after suspected stabbing in East Rockingham
City of Rockingham cracks down on illegal dumpers
Missing Mandurah girl found safe and well
Police hunt for man who threatened staff with knife during Falcon armed robbery
Authorities descend on Memorial Drive homeless camp, move on notices issued
Locals asked to have their say on new concept designs for Lakelands Youth Park