Iran nuclear scientist and another person killed in car bomb blast

A view of Iran's Natanz uranium enrichment facility in Isfahan province. It is said to have 8,000 centrifuges in operation.
A view of Iran's Natanz uranium enrichment facility in Isfahan province. It is said to have 8,000 centrifuges in operation.

(CNN) -- A nuclear scientist was killed in a blast in a Tehran neighborhood Wednesday morning, an Iranian news agency reported, the latest in a string of attacks against such scientists that Iran has blamed on Israel.

A motorcyclist placed a magnetic bomb under Mostafa Ahmadi Roshan's Peugeot 405, the state-run IRNA news agency said.

The blast wounded two others who were passengers in the car, IRNA said.

State television channel Press TV reported later Wednesday that two people had been killed in the car bombing but did not give more details.

Roshan, 32, was a deputy director for commercial affairs at Natanz uranium enrichment facility in Isfahan province and a graduate of Iran's Oil Industry University, according to the semi-official news agency Fars.

Natanz, which is said to have 8,000 centrifuges in operation, is one of two facilities that are enriching uranium in the country. This week, the United Nations' nuclear watchdog agency identified the second in the mountains of Qom province.

The latest attack comes as Iran is under increasing pressure from the West to halt its enrichment activities.

Officials in the United States and other Western nations have ratcheted up sanctions against Tehran since a November report by the International Atomic Energy Agency said the Iranian government was developing the technology needed to build a nuclear weapon. Last month, U.S. President Barack Obama announced sanctions against Iran's central bank.

Tehran maintains its nuclear program is for civilian energy purposes only, disputing allegations by the United States and other countries that it is trying to develop a weapons program.

But the IAEA has said it cannot verify whether the intent of Tehran's nuclear program remains peaceful.

Iran's 1st Vice President Mohammad Reza Rahimi said the attacks against its scientists would not stop the country from achieving its scientific goals, IRNA reported.

"Iranian scientists become more determined to take steps in line with the aspirations of the Islamic Republic in spite of terrorist operations," Rahimi told the news agency.

Wednesday's attack followed a similar mode of operation as others that have killed nuclear scientists in the capital city.

Iranian nuclear physicist Daryoush Rezaie, 35, was killed in an attack last July in front of his Tehran home by assailants on a motorcycle, Iranian media reported.

And on January 12, 2010, Iranian university professor and nuclear scientist Massoud Ali Mohammadi was killed in a blast when an assailant stuck a bomb under his car. Majid Jamali Fashi, an Iranian, reportedly confessed to the bombing and was sentenced to death in August, IRNA reported at the time. Prosecutors accused him of being a spy for Israel, the agency said. Israel does not comment on such claims.

In November 2010, nuclear scientist Majid Shahriari was killed in a blast where, again, a bomb was stuck under a car by someone on a motorcycle.

"The bomb used in the (Wednesday) explosion was a magnetic bomb, the same kind that were used in previous assassinations of Iranian scientists. And the fact is that this is the work of the Zionists," Fars news agency quoted Tehran's Deputy Gov. Safarali Baratloo as saying.

Iran uses the term "Zionist" to refer to Israel. The nation has been engaged in a war of words with Israel, whom it accuses of trying to destabilize the republic.

Israel has not responded to Tehran's claims.

However, Mickey Segal, a former director of the Iranian department in the Israel Defense Forces' Intelligence Branch, told Army Radio that Wednesday's attack was part of broader pressure being brought to bear on President Mahmoud Ahmadinejad's regime.

"Many bad things have been happening to Iran in the recent period. Iran is in a situation where pressure on it is mounting, and the latest assassination joins the pressure that the Iranian regime is facing," Segal said.

The Jerusalem Post reported Wednesday that the Israeli military chief of staff Beny Gantz, speaking at a Knesset Foreign Affairs and Defense Committee meeting, warned that "2012 will be a critical year in the connection between Iran gaining nuclear power, changes in leadership, continuing pressure from the international community and events that happen unnaturally."

Ali Ansari, a professor at the Institute for Iranian Studies at Scotland's University of St. Andrews, said more information is needed about the victims to help determine who's perpetrating the attacks.

Some have speculated that the victims were members of the opposition movement and could have been targeted by internal forces, Ansari said.

"But if it is true that Israel is behind it, Iran should make a formal complaint to the U.N. so they can get an answer from Israel," Ansari said. "Because if they really think some other country is killing their nuclear experts, why are they not giving them more protection?"

The IAEA reported Monday that Iran was enriching uranium to 20% at the Fordo nuclear enrichment plant in the mountains of Qom province, described by IRNA as "a reinforced facility sunk deep under a mountain" 90 miles southwest of Tehran.

Iran says it has 3,000 centrifuges in operation at the Fordo plant and that its program has a medical purpose.

Enriched uranium at low concentrations can be used to fuel power plants, but in extremely high concentrations it can be used to produce a nuclear bomb. Uranium enriched to between 3% and 5% is necessary to make fuel for reactors. Weapons-grade uranium is enriched to about 90%.

CNN's Shirzad Bozorgmehr, Kevin Flower and Lateef Mungin contributed to this report.

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