Iranian TV is claiming that today, an unknown aircraft fired a missile near the city of Dailam, near their nuclear power plant, causing an explosion.
Updates
16:30: Now there are reports that it could have been a fuel tank dropped from a plane.
16:45: Ha’aretz news ticker:
16:34 Iran Interior Ministry says explosion in southern city of Dailam caused by Iranian aircraft (AP)
You may all rest easy now.