Police say a teenager asked a 56-year-old man for money before punching him in the head in Falcon causing him to fall and hit his head on the pavement.
Mandurah Detectives are seeking information about Sunday night's incident in Falcon where a man was threatened.
Around 9:15pm, the 56-year-old man was walking along Cobblers Road when a male teenager has approached him and asked for a cigarette.
They spoke for a time before the youth demanded money from the man.
When he said he didn’t have any, the teenager punched him to the head causing him to fall to the ground hitting his head on the pavement.
The youth was last seen walking along Cobblers Street towards Koolinda Street.
He is described as being aged between 14 and 16 years of age with dark skin, approximately 178cms tall, medium to solid build and black wavy hair.
He was wearing a black hooded jumper, dark coloured pants and a gold cross earring in his left ear.
Detectives would like to speak to anyone who may have seen the incident or who lives in the area and has CCTV of the incident.
Anyone with information regarding this incident is asked to call Crime Stoppers on 1800 333 000, or report the information online at www.crimestopperswa.com.au.