There are reports coming out of Iran, that professor Mohammadi was killed in his home. Apparently, an explosive devise was thrown-in thru the window... and detonated be remote control. The explosion was so severe, it damaged cars and windows across the street. If all this is true... this does not have a Mossad or CIA fingerprint. Especially, since the professor had close relationship with the IRG... and recently signed an public internet decree supporting Mir Mousavi. I may be wrong... but this appears to have the mark of the Basij or fundamentalist elements of the Revolutionary Guard.
2 Turkish security personnel killed, 24 wounded by Kurdish suicide bomb in eastern Turkey (Reuters)
from the article: Iran: Israel, U.S. killed pro-Mousavi nuclear scientist