STATE Emergency Services crew from Busselton and Bunbury will form a specialist vertical rescue team to join the search for a man missing near Walpole.
Walpole Police have serious concerns for a 40-year-old man called Rowan Wallace Cook from a campsite at Aldridge Cove, which is along the Nuyts Wilderness Track, about 12km west of Walpole.
Three friends arrived in that location on Monday, November 18 and camped there for two nights.
They noticed a tent and personal belongings nearby but during their stay no person returned to the tent.
The group hiked out of the area and returned to Perth on Wednesday, November 20.
They raised the alarm with police about 6.20pm on Thursday, November 21.
Police attended the location and despite a search of the immediate area with the assistance of marine rescue volunteers and Department of Parks and Wildlife personnel, no one has been located.
Personal belongings at the scene are believed to belong to a person called Rowan Cook, however police have not been able to confirm the identity of this person.
It is possible the person may have been in the area or surrounding areas any time in the last two months.
Walpole Police would like to speak to anyone that has camped in the Aldridge Cove area in the last two months, anyone that has hiked nearby and spoken to a person named Rowan, anyone who recognises the camping equipment pictured and anyone who knows a person by the name Rowan Cook who was intending to go hiking in that part of the state.
Anyone with information is asked call Crime Stoppers on 1800 333 000.