A woman stabbed an innocent onlooker in the head in an apparently unprovoked attack that may be linked to a road-rage incident in Queens, police said Friday.

The 52-year-old victim was sitting on his porch outside his home on 53rd Ave. near 90th St. in Bayside when the woman, a stranger, approached and stabbed him in the head before fleeing in a red sedan around 11:47 a.m. on Thursday, cops said.

The man sustained a puncture wound and was taken to New York-Presbyterian Hospital Queens with a minor injury, according to police.

Just before the incident, the suspect parked her car about a block away on 53rd Ave. Her parking job obstructed traffic and set off a cacophony of car horns as frustrated drivers honked at her as they tried to get around her car, witnesses told CBS News.

According to witnesses, the woman appeared frustrated by the honking, got back in her car, and drove it a couple of feet forward before stopping outside of the victim’s home, where she proceeded to attack him.

“She then asked my husband, ‘What are you looking at?’ And then my husband just (did) not respond to her,” the victim’s wife told CBS. “And then she just, for no reason, stabbed my husband.”

“I see he’s full of blood around the head, shirt, everywhere,” she added.

Cops described the stabber as a heavyset woman wearing all black. She has not been caught.