A desperate search is under way for a quad bike rider who has been missing without water or food in 40C heat since Sunday morning in bush east of Perth.
Paul Pyke, 35, was riding with two friends when he disappeared about 10am on tracks off Gorrie Road in Sawyers Valley.
It was his first time riding in the area. Friend Steven Madaschi believed it was easy to get lost in the maze of gravel and red dirt tracks that crisscrossed the dense bush.
"He must have taken the wrong turn and we just couldn't find him," Mr Madaschi said.
They searched for several hours before calling police about 1.15pm.
As each hour passed yesterday without any sign of Mr Pyke or the blue quad bike he was riding, concern for his welfare grew.
Police in the air and in vehicles, plus about 50 State Emergency Service volunteers, are combing a 50km-radius of bush and say the big distances Mr Pyke could have travelled make finding him difficult. Water, food, a flare, a torch and a note telling him to wait have been left on the car where he began the ride.
Mr Madaschi said Mr Pyke was strong and could survive. Police will reassess the search later today if there is still no sign of him.