Police are searching for a suspect who fatally shot one person on a Green Line train at the Navy Yard Metro Station in Washington DC on Sunday.

According to Metro Police, the adult male victim was pronounced dead at the scene. Authorities are looking for a person, described as a “thin-build 25 to 27-year-old black male wearing all black with curly hair and a silver or gray gun.”

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We do not have a name yet.

According to D.C. police Assistant Chief Andre L. Wright, the attack began on a previous station platform but took place aboard a Green Line train at 11:45 a.m.

Wright claimed that the altercation took place at the L’Enfant Plaza station, where the attacker boarded the train. As the train approached the Waterfront station, the two men got into a quarrel, and the shooter fired at the victim multiple times before escaping the train, according to Wright.

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When the train arrived at the Navy Yard station, police were called. The man was pronounced dead at the scene.

Many of the passengers who were on the train at the time of the shooting gave authorities information about the tragic incident, according to Wright. Police have surveillance footage of the suspect from various metro stops. Moreover, Wright stated that his photograph is being sent to local law enforcement and would be distributed to locals shortly.

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Due to the police investigations, trains now run every 12 minutes and are single-tracked between Navy Yard and Anacostia. Travelers should prepare for delays.

This story is still developing. We are working to compile more information. Keep checking back for developments as they get updated in the article.