A 16-year-old boy was robbed Monday night while walking past Heritage Park in Walla Walla, police said.

The teen told officers that the first suspect grabbed his backpack and when the teen tried to get it back, the suspect punched him in the face and ran off, said Walla Walla Officer Tim Bennett.

A second suspect, later identified as Devon A. Fisher, 19, of Walla Walla, then grabbed other items from the teen and took off in a different direction, Bennett said.

Fisher was tracked down at his home and arrested. He was booked into the Walla Walla County jail on suspicion of first-degree robbery.

Investigators are looking for the other suspect.