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Bobbi Kristina Brown's relatives fight at Atlanta hotel

Atlanta police say a relative of singer Bobby Brown hit another relative in the head with a bottle during a fight at a hotel.

Police spokeswoman Kim Jones says officers responded to the W Hotel early Friday in midtown, though the reason for the fight was unclear.

Police say Tina Brown hit Shayne Brown in the head with a bottle. Police did not specify their relationships to the entertainer or to each other.

Tina Brown left the scene before police arrived. Shayne Brown had cuts on his head and drove himself to a hospital.

According to TMZ, Shayne Brown reportedly called Bobby Brown's older sister, Tina Brown, "a crackhead," which sparked some of the trouble.

Bobby Brown has been seen this week in Atlanta, where his daughter, Bobbi Kristina Brown, is in a hospital. The 21-year-old was found face down in a bathtub at her home just north of Atlanta on Jan. 31.

Earlier this week the family released a statement saying that Bobbi Kristina was "fighting for her life."

Bobbi Kristina Brown's mother, Whitney Houston, was found dead on Feb. 11, 2012, of an accidental drowning in a hotel bathtub in Los Angeles -- just a night before the Grammy Awards. This year's Grammys take place on Sunday.