A 61-year-old San Francisco man was killed Thursday night, when a fight on a notorious SoMa street turned deadly.

Officers from the San Francisco Police Department were called to the famously troubled stretch of Sixth Street between Market Street and Mission Street at 10 p.m. Thursday on reports of a stabbing.

According to witnesses, a 31-year-old man and a 61-year-old man had been involved in a "physical altercation." The younger man stabbed the older man in the torso, police said Friday afternoon.

The crime occurred on the same block as the SFPD Central Market Safety Hub, a police substation to improve "improve neighborhood safety and cleanliness" in an area once described by the SF Chronicle as "one of San Francisco's last pockets of skid row, where poverty and desperation have seeped deep over the decades...there is no easy way to fix the problems, which include a troubling crime rate."

One victim of the crime rate was the man stabbed Thursday, who was transported to San Francisco General Hospital. He died of his injuries there later that night. His name had not been released at publication time.

Police say that the suspect in the stabbing has already been taken into custody. A request from SFist for more information on the suspect or the motive behind the homicide was not responded to at publication time.