PLEASANT GROVE, Utah (AP) — Police in Pleasant Grove say a man fatally shot his uncle who had been banging on the front door of the home of the nephew's father while holding a hammer in each hand.

Police say the 28-year-old nephew shot his 50-year-old uncle with a pistol during an ensuing struggle in the doorway Friday and that the case is considered an open homicide investigation.

Police Capt. Michael Roberts says the nephew told police he shot his uncle in self-defense but that police didn't know if any threats were made.

No identities were released.