MANAMA, BAHRAIN, NOV. 17 -- Iraqi warplanes raided an unfinished Iranian nuclear power plant today, killing 11 people, and an Iranian nuclear official said the plant contained nuclear material, according to unconfirmed Iranian news reports.

Iraq did not announce that it had bombed the plant and there was no independent confirmation of the attack. Iraq has attacked the plant at least five times since 1984.

{State Department officials in Washington said the plant was not functioning and had been bombed many times in the past. They said they doubted that any nuclear material would have been released following today's attack.}

Iran's official IRNA news agency quoted Reza Amrollahi, president of the Atomic Energy Organization, as saying the raid might lead to "the same transfrontier radioactive release and radiological consequences as the Chernobyl nuclear accident."

IRNA, monitored in Cyprus, said Amrollahi sent an "urgent protest note" to Hans Blix, director general of the International Atomic Energy Agency in Vienna. It added that he asked Blix to rush a team of experts to the scene to monitor the effects of the raid, the agency said.

In Vienna, a spokesman for the energy agency said he knew nothing about a request for such a team. But the spokesman, James Daglish, said a representative from the Iranian mission to the agency was seeking a meeting with Blix.

IRNA accused Iraq of violating "international conventions."

Tehran radio said among the 11 people killed at the unfinished nuclear facility were "one of the plant's top nuclear power experts" and a West German engineer.

In Bonn, the Foreign Ministry said Iran officially notified the government that the West German engineer was killed. The ministry said the engineer worked for the Technical Inspection Agency of Essen, but declined to give his name pending notification of relatives.

Iran said last year that it had moved "fissionable material" into the plant. It warned at the time that an attack could trigger another Chernobyl, a reference to the explosion and fire at the Soviet nuclear plant in April 1986 that killed 31 Soviets and sent a cloud of radiation around the world.

Officials of the International Atomic Energy Agency said earlier they could not confirm the claim about "fissionable material" because no on-site inspection was made.

The 1,200-megawatt plant was being built by a West German company before Islamic fundamentalists seized power in Tehran in 1979 and closed it down.

{Agence France-Presse quoted a spokesman of Kraftwerke Union, the West German company, as saying the company had never delivered nuclear fuel to Iran.}

Iraq said in a military communique that its jets conducted two raids against "the Iranian industrial and chemical production complex at Bushehr," 37 miles from the nuclear facility.

President Saddam Hussein of Iraq appeared to allude to chemical weapons when he was quoted by the news agency as saying that "by destroying the Iranian industrial complex for chemical production in Bushehr, Iraq has foiled one of the filthiest and dirtiest Iranian intentions against the Arab nation."

Meanwhile, the supertanker Bridgeton left a Persian Gulf shipyard, where it spent two months under repair for mine damage, and rejoined the Kuwaiti tanker fleet sailing under the U.S. flag.