A gunman dressed as Santa opened fire on a suburban Los Angeles holiday party, killing at least five people before killing himself, UPI quoted the police as saying today. Three people, ages 8, 13 and 16, were injured and taken to hospitals. Police said witnesses identified the suspect as Bruce Jeffrey Pardo, 45, The New York Times reported. The shootings occurred shortly before midnight at a house in Covina, which was then set afire, and may have been prompted by a marital dispute, police said. Revelers told police he changed clothes on the street before leaving the house, which was owned by Pardo's estranged wife. It was not immediately determined what Pardo's relationship was to the dead and injured. Identities were not immediately released.