According to press reports, another Iranian nuclear scientist was killed in a bomb attack:

The bomb assassination of an Iranian atomic scientist on Wednesday will not stop “progress” in Iran’s nuclear programme, Vice President Mohammad Reza Rahimi told state television. “Today (Wednesday) those who claim to be combatting terrorism have targeted Iranian scientists. They should know that Iranian scientists are more determined than ever in striding towards Iran’s progress,” he said. He called Wednesday’s killing of Mostafa Ahmadi Roshan, a deputy director of Iran’s Natanz uranium enrichment facility, “evidence of (foreign) government-sponsored terrorism.”

Sometimes, assassination can forestall far bloodier conflict. As for Roshan, good riddance.