A 19-year-old man was left bruised and unconscious Thursday afternoon, following a violent altercation with a group of men and woman on Market Street.

According to the San Francisco Police Department, the youth was walking down Market Street near San Francisco's infamous Sixth Street at 1 p.m. Thursday when he began talking with a group of people at the corner.

Police say that "a verbal altercation" broke out between the man and the group of people. Eventually, a man police describe as in his 30s "took a baseball bat" and struck the victim in the head, sending him plummeting to the ground.

The metal-bat-wielding man continued to hit the victim "multiple times in the face and body with the bat," according to the SFPD. The other members of the group, described as four men in their 20s to 30s, a woman in her 20s to 30s, and a woman who appeared to be in her 60s, joined in, kicking the fallen man as he lay.

He lost consciousness, police say, as his attackers stole his backpack "and fled in an unknown direction."

The 19-year-old suffered bruising and lacerations to his face and body. He was transported to San Francisco General Hospital for treatment of his injuries, which he is expected to survive.

As of publication time, no arrests had been made, nor was any additional suspect information available. Police ask that if you know anything about the case, you call SFPD's Anonymous Tip Line at 415-575-4444 or to text a tip to TIP411 with SFPD at the beginning of the message.