A teenager who allegedly shot two passengers on SEPTA's Market-Frankford Line after an argument about basketball was arrested Monday, police said.

Eric Early, 16, was charged with aggravated assault and related offenses. His brother Matthew, 18, was still sought, police said.

Police said Eric Early opened fire Wednesday after an argument started between the brothers and two Chicago fans following the 76ers' loss to the Bulls that night.

At 10:39 p.m., when the westbound El stopped at the 46th Street station, the brothers got out and Eric Early turned and fired into the car, police said.

One of the Bulls fans, a 36-year-old man, was shot in the abdomen, police said. The same bullet also struck the other fan, a 30-year-old man, in the thigh.

The perpetrators then ran from the station.

Police said they identified the Earlys, of the 100 block of South 49th Street, from surveillance footage.

Anyone with information about the whereabouts of Matthew Early may contact Southwest Detectives at 215-686-3183 or -3184.

Contact Robert Moran at 215-854-5983 or bmoran@phillynews.com, or follow @RobertMoran215 on Twitter.