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Chris Brown has been arrested. Police report that the singer, 24, was taken into custody around 4:25 a.m. after an altercation outside a Washington, D.C., hotel.

Authorities tell TMZ that Brown got into an argument with a man outside the W hotel and allegedly started punching him. The man was taken to the hospital for treatment.

Just hours before, Brown performed at a Howard University homecoming after party at The Park at Fourteenth.

A second man, Christopher Hollosy, 35, was also arrested and charged with felony assault. Hollosy is believed to be Brown’s bodyguard.

This story is still developing …