Police have issued an urgent appeal to the public to help locate two missing brothers, almost a week after they went missing in Adelaide.
The boys - David and Peter Woodforde - were last seen riding off on their bikes from their Christies Beach home about 5.15pm on Tuesday 20 September.
Peter is 12 and David is 9.
Police said they have concerns for the boys' welfare, and are seeking public assistance to help find them.
"Both boys rode off on dark coloured BMX bikes," authorities said in a statement.
"Peter is described as 150cm tall with a slim build and black hair tied in a top knot. He was wearing a blue/white zip up jacket, long dark pants and white NBL sneakers.