Iranian nuclear scientist killed in Tehran, by whom?

According to the most recent reports arriving from Tehran, a leading Iranian nuclear scientist has been assassinated on Saturday, Iran's student news agency ISNA reported without giving his name."An Iranian nuclear scientist was assassinated in front of his house today ... and his wife was also wounded," it said. No other details were immediately available. Iran's semi-official Mehr news agency, quoting an unnamed police source, said police were investigating the assassination which took place in an eastern Tehran area.

Iran has been long pressed for its peaceful nuclear program by the "International Community of Humanitarian Terrorists" who howl their rhetoric of "Anti-Semitism" against the Islamic Republic while at the same time, Iran has shot down 3 USZ-Israhelli spy drones near its Nuclear facilities. The most recent drone spying on the Iranian Nuclear facilities was shot down by the Revolutionary guards on Tuesday, 19th July 2011.Earlier in the day, Iran's Foreign Ministry Spokesman Ramin Mehmanparast had said that the country is installing a new generation of uranium enrichment centrifuges in the country's nuclear facilities to enhance the Islamic Republic's peaceful nuclear program.