The Persians planted this story, no doubt. Clickfool is right, the Zionists wouldn't kill with Radioctive poisining. Only the fools in Tehran would make up a story like this to cover over some screw up.
U.S. says working on initiative to de-escalate Syria fighting, with focus on Aleppo (Reuters)
from the article: U.S. website: Mossad killed Iranian nuclear physicist