MANAMA, BAHRAIN, NOV. 1 -- Iran's powerful parliamentary speaker accused the United Nations today of "cheating" Iran through efforts to end the seven-year-old Persian Gulf war.

Speaker Ali Akbar Hashemi Rafsanjani, in comments carried by official Iranian news media, indicated his country will not accept a U.N. resolution to end the war with Iraq. The comments were Iran's harshest criticism to date of the United Nations.

Meanwhile, Iraq and Iran said their warplanes flew more raids against each other's oil installations, and a senior Soviet diplomat visiting Tehran was quoted as condemning "ugly" U.S. actions in the gulf.

In a report on Tehran radio, monitored in Cyprus, Rafsanjani said, "The work on the international forums will come after a decisive blow on the battlefield." His remarks were in a speech to students of a Tehran military college of the Islamic Revolutionary Guard Corps.

"In our talks with the United Nations, we have told them the solution for ending the war. But as the time goes on, it seems that they are unreliable and that they are cheating us," state-run Tehran television quoted Rafsanjani as saying. "It is obvious that they {the United Nations} have ill intentions."

His comments came after Yuli Vorontsov, Soviet first deputy foreign minister, met with Iranian Foreign Minister Ali Akbar Velayati in the last stop of a regional tour. Vorontsov was believed to be seeking Iran's acceptance of the U.N. cease-fire resolution passed last summer.

Iraq said it could accept the cease-fire plan but Iran has refused to commit itself unless an inquiry is held to determine which side started the conflict. Iran wants Iraq to be branded as aggressor before a settlement is reached.

Tehran claims Iraq started the war Sept. 22, 1980, when it invaded western Iran. Iraq says Iran ignited the conflict Sept. 4, when it shelled Iraqi border areas.

Secretary of State George P. Shultz said Friday that the Soviets would advise Washington of Vorontsov's findings.

IRNA quoted Vorontsov as saying Moscow regarded the U.S. "military buildup" in the gulf and its Oct. 19 bombardment of Iranian offshore oil platforms as "a threat to world peace and security, worrying many countries." The agency said he told Velayati the Soviet Union "wishes to see the Americans pull out and their ugly acts discontinued."

Moscow has demanded that Tehran be given more time to respond to the U.N. cease-fire plan. Shultz contends the time has come for sanctions against Iran.

{In Amman, Jordan, Reuter reported, British Foreign Secretary Geoffrey Howe said an Arab League summit due to open there Nov. 8 could assist peace efforts "not least by sending a clear message to Moscow that Soviet foot-dragging at the U.N. must come to an end."}