PROVO — Provo police say they arrested a man for chasing his brother-in-law with a hammer in what investigators say was a fight over gang differences.

On Wednesday night, the brother-in-law got into a verbal dispute with the man's mother, and when the man later confronted the brother-in-law about it, they began fighting, according to a police report filed in 4th District Court.

After throwing a few punches, the man grabbed a hammer and chased his brother-in-law out of the house, the report said. The brother-in-law told police he felt the hammer hit his hand, although police couldn't confirm whether the swelling was created by a hammer or from throwing punches.

The brother-in-law also said that the man was flashing gang signs and making fun of his gang, the police report said.

The 31-year-old Provo man was booked into the Utah County Jail for investigation of aggravated assault with a gang enhancement and was being held on $5,000 cash or bond bail.