The incident unfolded at about 3:20 a.m. at a 7-Eleven store in the 7200 block of Sandpoint Way NE, said Acting Lt. George Bray of the Seattle police.
A masked robber entered the store and pistol-whipped the clerk, demanding cash. The suspect then fled the scene, but dropped a bag and some money as he fled. He remains at large, Bray said.
Police and medics responded to the scene. The clerk was taken to the hospital with a gash to his face.
Police attempted to track the suspect using a K-9 police dog but were unsuccessful.