Police on Wednesday arrested a hatchet-wielding suspect accused of clobbering an office worker in downtown Portland, authorities said.

Nathan J. Shrader, 35, used the blunt end of his ax to bludgeon the man near Southwest Salmon Street and Fourth Avenue around 7:45 a.m., said Sgt. Chris Burley, a Portland police spokesman.

The injured man, who works in the Standard Insurance Center, did not require medical attention, police said. Investigators learned that Shrader had been accused of trespassing at the office building earlier in the day, Burley said.

Shrader, who sports multiple face tattoos, was found a short time later and booked into the Multnomah County jail on suspicion of second-degree assault, police said.

Officers also recovered the hatchet they suspect was used in the attack.

-- Shane Dixon Kavanaugh; 503-294-7632