AIRCRAFT ATTACK IRANIAN OIL RIGS IN SOUTHERN GULF Unidentified jets attacked three Iranian oil rigs in the southern Gulf early on Monday, setting at least one of them ablaze, regional shipping sources said. Earlier today in Washington, U.S. Television networks had reported that American forces launched a retaliatory strike against Iran late Sunday, attacking two Iranian offshore oil drilling platforms and setting them ablaze. The shipping sources said Iran's Sassan, Rostam and Rakhsh offshore oilfields were attacked at 0700 local (0300 GMT) by a wave of jet fighter bombers. Smoke was seen spiralling up from the Rostam field soon after. At least one of the other two targets was also believed to be ablaze, the sources said. The Sassan and Rostam fields have been targets for Iraqi air strikes in the past, but Baghdad had not reported any southern Gulf missions prior to news of the latest attack. Shipping and military sources in the region have said Iran used its southern Gulf rigs as bases to launch helicopter and later speedboat attacks on neutral ships in the waterway. U.S. Officials had been meeting on a response since Friday when an attack on a Kuwaiti port severely damaged a U.S.-flagged ship. President Reagan said on Sunday he had already made a decision on the U.S. Response to Friday's Iran attack but would not say what the decision was.