Iran has rejected the reports of grenade attack on Iranian President Mahmoud Ahmadinejad. Iranian news agency IRNA quoting Iran's presidential office has rejected as false the reports of some foreign news sources that a grenade exploded near the motorcade of President Ahmadinejad during his visit to the western city of Hamedan today.Earlier news agencies report said that Iranian President Mahmoud Ahmadinejad survived an attack with a homemade explosive device on his motorcade during a visit to the western city of Hamadan. The report said that Ahmadinejad's convoy was targeted as he was travelling from Hamadan's airport to give a speech in a local sports arena and the president was unhurt but others had been injured in the blast.