Unprovoked stabbing in San Francisco’s Chinatown caught on camera

Shocking surveillance video captured a brazen daylight stabbing in San Francisco’s Chinatown on Thursday — showing a hooded man casually walking up behind an apparent stranger before plunging a knife into his back.

The disturbing footage, obtained by local station KRON4, shows the suspect strolling along the sidewalk near the corner of Stockton and Sacramento streets just after 1 p.m.

As he approaches a man waiting near a crosswalk, the attacker suddenly pulls out a knife and thrusts it into the victim’s lower back in what appears to be an entirely unprovoked assault.

The suspect then briskly walks away, crossing the street and disappearing from the camera’s frame.

The victim turns around in shock, clutching his back and stumbling for several moments before collapsing onto the sidewalk. He appears to briefly try to stand again before eventually lying face down on the pavement.

Several bystanders pass by the scene in the aftermath, though one man nearby appears to pull out his phone to call for help.

When officers arrived, they found the victim suffering from a stab wound. Paramedics transported him to a hospital with life-threatening injuries, police said.

Investigators later located a suspect matching the description provided by witnesses near the 600 block of Powell Street, where he was detained without incident and taken into custody, according to KRON4.

Authorities have not released the suspect’s name, possible charges or a motive for the attack.

The attack happened just hours before San Francisco mayor Daniel Lurie’s police security team was attacked in infamous drug-plauged Tenderloin neighborhood of the city.

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