Assassins on motorbikes killed a top Iranian nuclear scientist and injured a second in James Bond-style hits this morning.
They attached magnetised bombs to their cars which exploded within seconds as they drove to work in Tehran.
Iran's nuclear chief Ali Akbar Salehi said the man killed, Majid Shahriari, was involved in a major project with the country's nuclear agency.
Mr Shahriari's wife, who was in the car with him, was wounded.
The injured scientist, Fereidoun Abbasi, is believed to be a laser expert at Iran's Defence Ministry and one of the country's few top specialists in nuclear isotope separation. His wife was also injured.
Let the whodunit speculation begin: Was it the CIA? (Possible, although the US has denied "any link to previous attacks.") Mossad? (Israel has issued its customary "no comment" on the matter). Or might it have been Her Majesty's MI-6 after all? Iranian officials and media have settled on Door Number Two, unsurprisingly, and are leveling bellicose warnings against testing the "patience" of the Islamic regime:
King Abdullah of Saudi Arabia has repeatedly urged the United States to attack Iran to destroy its nuclear programme, according to leaked US diplomatic cables that describe how other Arab allies have secretly agitated for military action against Tehran.
The Saudi king was recorded as having "frequently exhorted the US to attack Iran to put an end to its nuclear weapons programme", one cable stated. "He told you [Americans] to cut off the head of the snake," the Saudi ambassador to Washington, Adel al-Jubeir said, according to a report on Abdullah's meeting with the US general David Petraeus in April 2008.
Surely the Saudis, the Jordanians, and others have fairly advanced intelligence agencies capable of pulling off covert ops, right? Neighboring states are clearly just as spooked by the prospect of a nuclear Iran as anyone else, and may even have greater motivation to take piecemeal measures like targeted assassinations into their own hands.
In other words, Iran may be publicly fingering Israel and the United States for today's stealth hits, but you'd better believe there's an enormous amount of fear and loathing going on behind closed doors.
True international intrigue.