Police hold concerns for the welfare of a 51-year-old man, after he went missing in the Stirling Ranges.
Matthew Dwyer - a professional photographer who frequents the area - has not been able to be located since Wednesday morning.
At around 7.30, his keys and backpack were found on Bluff Knoll by a member of the public, while his camper-van was found in the car park.
He is described as approximately 180cm tall, with a slim build and grey balding hair.
It is believed he may be wearing long pants and a blue top, possibly with a jumper.
An Australian Maritime Safety Authority Search and Rescue Jet conducted a search of the area overnight, and will today continue with a police helicopter and emergency services.
Anyone who sights Mr Dwyer or has any information regarding his whereabouts is asked to call police immediately on 131 444.
Police seek witnesses to serious crash in Pinjarra
Local artist Emma Blyth inspires community to raise $10k for Mandurah kids facing hunger
Hunt continues for Baldivis ATM thieves
Channel 7 Mandurah Crab Fest a cracking success
Giant puppets, illuminated installations to descend on Baldivis Sports Complex
Man fined nearly $2k for undersize crab haul near Coodanup
Australia Post reveals Mandurah residents receive highest volumes of parcels
Safety Bay man charged over South West pursuit
Arson Squad continue investigation into Waikiki house fire