BBC News:
Supermodel Naomi Campbell has been arrested in New York on suspicion of assaulting her assistant.
The assistant, a 42-year-old woman, needed hospital treatment after the attack at Campbell's home in Manhattan.
A New York Police Department spokesman told BBC News the assistant had needed four stitches to her head after being hit by a mobile phone following a row.
Her New York publicist said she suspected an attempt at "retaliation" by the assistant, who had been fired.
Detective Bernard Gifford said he did not know what the argument was about.
He said Ms Campbell would be charged with a felony and would later go before a judge.
A felony carries a minimum sentence of one year in the US.
Ms Campbell, who shot to fame after being discovered in London aged 15, is well known for her fiery temper.
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