http://www.wsbtv.com/entertainment/10927325/detail.html MALIBU, Calif. -- Police have arrested Oscar-nominated actor Ryan O'Neal on assault charges. Deputies and paramedics arrived at O'Neal's Malibu residence early Saturday morning on a battery call. Los Angeles County Sheriff's Lt. John Benedict said the actor allegedly assaulted his adult son, Griffin. Benedict did not provide details on what caused the fight and says an investigation is under way. The 65-year-old actor was arrested for assault with a deadly weapon and negligent discharge of a firearm. He was booked and released on a $50,000 bond. Benedict said no one was treated for injuries. The twice-divorced Ryan O'Neal, known for his boyish good looks, went from a TV soap opera to an Oscar-nominated role in "Love Story." With his first wife, Joanna Moore, he has two children, Griffin and actress Tatum O'Neal. He also has a son, Redmond, with actress Farrah Fawcett. In 2001, he was diagnosed with leukemia. Griffin O'Neal has a history of trouble. In 1986, he was acquitted of manslaughter for a boating accident that killed director Francis Ford Coppola's 23-year-old son, Gian-Carlo. In 1992, he avoided a possible three-year jail sentence by pleading no contest to charges he shot at his estranged girlfriend's unoccupied car.