One man is in custody after police say he shot his half-brother during an altercation with three other people on the Red Line Sunday afternoon, Metro Transit Police.

The shooting happened around 3 p.m. just before the Takoma Metro Station. According to police, 18-year-old Jermaine Brown was traveling with his 14-year-old half-brother when there was an altercation aboard the train with three other people. During the altercation, police said Brown pulled out a gun and fired multiple times.

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One bullet hit the 14-year-old in the abdomen and two other bullets struck the railcar. Police said the teenager who was shot was able to get out at that station and get help. He was transported to the hospital and is in stable condition.

Brown was charged with a single count of first-degree assault in Montgomery County.

A Metro Transit Police spokesperson said the three people involved got off the southbound train, jumped onto an opposite Red Line train headed back north and got off at the Silver Spring Metro Station.

MTPD detectives are actively working to identify and locate the three persons of interest involved in the incident. Anyone with information on their identify or location should call the MTPD Criminal Investigations Division at 301-955-5000 or text MyMTPD (696873).

The incident remains under investigation and additional charges are possible.