responsible, it still would not set back Iran's nuclear program as it takes many specialists, not just one scientist. It's highlt doubtful that Israel was responsible. In order to knock out or significantly slow Iran's nuke strategy, it would take a military intervention, not just idle talk and sanctions.
5 killed, 24 injured in attacks in southeast Turkey (AP)
from the article: 'We will avenge Israel over murder of Iran nuclear scientist'