Los Angeles police Officer Bruce Borihanh says a woman was arguing with another woman in the Boyle Heights Food4Less market Tuesday night when a man accompanying one of the women pulled a gun and fired.
The woman was wounded in the leg. She was taken to a hospital for treatment.
The gunman and three others fled but were later arrested.
They were booked for booked at the Hollenbeck Station jail for investigation of attempted murder.
The names haven't been released.