Sunni insurgents reportedly carried out a double mosque bombing at a Shiite mosque on Thursday in Zahedan, Iran.
The Associated Press reports that at least 27 people were killed and more than 270 were injured in the attack. Among the dead were members of Iran's elite military, the Revolutionary Guard, many of whom were at mosque for Iran's national Revolutionary Guard Day and for the birthday of Hussein, Prophet Muhammad's grandson.
The first blast went off while Shiite followers were at the mosque's birthday celebrations in the evening, local time. Twenty minutes later, a second bomber detonated his vest as the mosque was being evacuated. The militant group Jundallah claimed responsibility for the blasts on its Web site.
The deputy head of the Revolutionary Guard, Gen. Hossein Salami, said the fallen worshippers "were martyred by hands of mercenaries of the U.S. and the U.K.," according to The AP. Gen. Salami is referring to the Guard's claim that both countries have supported Jundallah, which has reportedly masterminded repeated strikes against the Guard.
U.S. Secretary of State Hillary Clinton condemned the bombings and called for those responsible to be held accountable.