Iraq said it repelled two Iranian attacks on its Majnoon oil fields on the southern front of the 6-year-old war. "Most of the attacking force was wiped out," a military spokesman said in Baghdad. Iran seized the oil fields early in 1984, but Iraq is believed to have recaptured most of the area. Iran had no comment on the reports of Majnoon combat, but the Iranian news agency said the Iraqis shot down one of their own planes with a rocket fired from another jet over the southern Faw Peninsula. The agency also said that Iranian jets bombed Iraqi oil installations southwest of Basra.