TEHRAN, Iran Updated at 1:15 p.m. ET: The Obama administration is denying any role in the killing of an Iranian university professor working at a key nuclear facility. White House spokesman Tommy Vietor said the U.S. "had absolutely nothing to do" with Mostafa Ahmadi Roshan's death and the U.S. condemns "all acts of violence, including acts of violence like what is being reported today."
Published at 9:46 am ET: Two assailants on a motorcycle attached a magnetic bomb to the car of an Iranian university professor working at a key nuclear facility, killing him and wounding two people on Wednesday, a semiofficial news agency reported.
The attack in Tehran bore a strong resemblance to earlier killings of scientists working on the Iranian nuclear program.
It is certain to reinforce authorities' claims of widening clandestine operations by Western powers and allies to try to cripple nuclear advancements.
The bomb killed Mostafa Ahmadi Roshan, a chemistry expert and a director of the Natanz uranium enrichment facility in central Iran, the semiofficial Fars news agency reported.
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Witnesses told Reuters they had seen two people on the motorcycle fix a bomb to the car.
"The bomb was a magnetic one and the same as the ones previously used for the assassination of the scientists, and is the work of the (Israelis)," Fars quoted Tehran's Deputy Governor Safarali Baratloo as saying. "The terrorist attack is a conspiracy to undermine the (March 2) parliamentary elections."
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Tehran has accused Israel's Mossad, the CIA and Britain's spy agency of engaging in an underground "terrorism" campaign against nuclear-related targets, including at least three slayings since early 2010 and the release of a malicious computer virus known at Stuxnet in 2010 that temporarily disrupted controls of some centrifuges a key component in nuclear fuel production. All three countries have denied the Iranian accusations.
But Israeli officials have hinted about covert campaigns against Iran without directly admitting involvement.
On Tuesday, Israeli military chief Lt. Gen Benny Gantz was quoted as telling a parliamentary panel that 2012 would be a "critical year" for Iran in part because of "things that happen to it unnaturally."
Roshan, 32, was inside the Iranian-assembled Peugeot 405 car together with two others when the bomb exploded in north Tehran, Fars reported.
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Roshan was involved in building polymeric layers for gas separation, which is the use of various membranes to isolate gases. He was also deputy director of the Natanz uranium enrichment plant, in central Iran, for commercial affairs. According to conservative news website, mashreghnews.ir, Roshan was in charge of purchasing and supplying equipment for the Natanz enrichment facility.
A similar bomb explosion on Jan. 12, 2010, killed Tehran University professor Masoud Ali Mohammadi, a senior physics professor. He was killed when a bomb-rigged motorcycle exploded near his car as he was about to leave for work.
In November 2010, a pair of back-to-back bomb attacks in different parts of the capital killed one nuclear scientist and wounded another.
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And in July 2011, motorcycle-riding gunmen killed Darioush Rezaeinejad, an electronics student. Other reports identified him as a scientist involved in suspected Iranian attempts to make nuclear weapons.
Rezaeinejad allegedly participated in developing high-voltage switches, a key component in setting off the explosions needed to trigger a nuclear warhead.
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"Instead of actually fighting a conventional war, Western powers and their allies appear to be relying on covert war tactics to try to delay and degrade Iran's nuclear advancement," said Theodore Karasik, a security expert at the Dubai-based Institute for Near East and Gulf Military Analysis.
'Clean, easy and efficient'
He said the use of magnetic bombs bears the hallmarks of covert operations.
"It's a very common way to eliminate someone," he added. "It's clean, easy and efficient."
US denies killing Iran nuke expert with magnet bomb - World news - Mideast/N. Africa - Iran - msnbc.com
Regardless of who carried it out, will Christians across the globe denounce these acts?