Reports from Iran Monday night said that a large explosion had been heard in Isfahan, where several key nuclear facilities are located, particularly a uranium conversion plant. If correct, Monday's explosion would be the second in about two weeks, after 21 members of an elite Iranian army unit were killed outside Bidganeh village, 40 kilometers southwest of Tehran.
A spokesperson for the Revolutionary Guard was quoted as saying that the explosion Monday occurred as some weapons were being transported in the area.