Iranian President Mahmoud Ahmadinejad's motorcade was not attacked by a grenade on Wednesday, an official in his media office told foreign news agency, explaining that an explosion was from a "firecracker." "It was a firecracker, and a statement will be released soon," the source said. He was responding to reports on a conservative website that a hand grenade had exploded next to a vehicle carrying reporters accompanying the president in the western city of Hamedan.