A mid-day altercation just outside Powell Street Station ended in injuries for a BART staffer and an arrest for his alleged attacker.

According to San Francisco Police Department spokesperson Officer Grace Gatpandan, police were called to one of the entrances of the Powell Street BART and Muni station at 12:40 p.m. Friday, near the bustling intersection of Powell and Market Streets.

When officers arrived, they found a man, described only in his 30s, suffering from a stab wound to his abdomen. BART police Lieutenant Paul Kwon confirmed to Bay City News that the victim was a BART station agent.

According to witnesses, the station agent and the suspect were engaged in an argument, which escalated to the point that the suspect pulled out a knife and stabbed the station agent.

The suspect, described only as a man in his 40s, was arrested at the scene, Gatpandan says.

The station agent was transported to San Francisco General Hospital with injuries that are not considered life-threatening, Gatpandan says.

As of publication time, other information, such as the motive behind the stabbing, remain under investigation. Anyone who might have witnessed the attack is urged to call SFPD's Anonymous tip line at at (415) 575-4444 or to send a tip by text message to TIP411 with "SFPD" in the message.