ERIE, Pa. (AP) — Authorities say a father killed his two young children and then set fire to their northwestern Pennsylvania house, where he was also found dead. State police said the bodies of 48-year-old Richard Zimmer and the 10-year-old boy and 13-year-old girl were found after the blaze was reported shortly 2 p.m. Tuesday in the Greene Township home in Erie County. Police said concerned family members had gone to the home after Zimmer failed to show up for a custody hearing earlier in the day and arrived to find heavy smoke in the residence.