The San Francisco Police Department is on the lookout for an enraged driver, after he intentionally used his car to critically injure a pedestrian.

It all happened at around 7 p.m. Friday, on Underwood Avenue near Jennings Street in the Bayview District. According to the SFPD, a male driver in a "4 door black vehicle" stopped his car "in the middle of the street."

After stopping, he "became involved in a verbal altercation" with a 56-year-old male pedestrian. As the pedestrian approached the driver, the driver opened his door then "drove his vehicle forward, striking" the pedestrian and dragging him down the street.

The pedestrian sustained life-threatening head trauma, according to the SFPD, and was transported to an area hospital. An update on his condition was not available at publication time.

The suspect fled the scene, and hasn't been seen since. According to police, no further information is available on the driver or his car, but they still ask that anyone with more information on the case contact SFPD's anonymous tip line at (415) 575-4444 or text-a-tip to TIP411 with "SFPD" at the beginning of the message.

Previously: Hit-And-Run At Polk And Pine Is SF's Third In Three Days