There was an brazen, daytime assault on Mission Street (near Valencia) in Bernal Heights on Sunday afternoon , and it appears to have been unprovoked. Evan Sernoffsky from the SFGate reports:

Police in San Francisco are on the hunt for a assailant with brass knuckles who cold-cocked a 36-year-old man on a sidewalk Sunday in the city’s Mission Bernal neighborhood.

The attacker, described as a man in his 20s, walked up to the victim around 4:25 p.m. on the sidewalk on the 3200 block of Mission Street near the Knockout bar, police and a witness said.

Armed with a fist-full of brass knuckles, the assailant began wailing on the victim, leaving him pummeled and unconscious at the scene.

A witness who saw the brutal beating said the attacker hit the victim three-to-five times before passersby intervened and called 911.