UPDATE, May 27: WA Police say Sean has been found safe and well.
POLICE have concerns for missing teenager Sean Ryan Pentony, who has been missing for a week.
Sean (16) was last seen on Thursday May 17 on Shenton Road in Swanbourne.
There was an unconfirmed sighting of him in Freshwater Bay on Wednesday May 23.
Sean is described as fair skinned, approximately 172cms tall, with a slim build, blue eyes and collar length blonde hair.
He was last seen wearing a red long sleeve jumper, navy blue shorts, dark coloured shoes and carrying a black backpack.
Anyone who sees Sean or anyone with information about his whereabouts, is urged to call Police on 131 444.