COUGAR, Wash. -- A fourth arrest was made Thursday in a rural southwest Washington beating.

Clark County deputies said two men were beaten with rocks, tools, boots and fists last weekend in the woods near Cougar, Wash.

The attackers, who had been camping in the area, stole shoes and cell phones from the men and then set one of the victim's trucks on fire, according to authorities.

Firefighters responded to put out the fire and found the victims badly beaten, deputies said.

Since the alleged attack, authorities have arrested Roger Rettinger, John Hilton and Brandon Wilson in connection with the attack.

On Thursday morning, deputies arrested Scott Clymer outside of his attorney's office in Vancouver.

There are no further suspects outstanding, according to authorities.