Iranian President Mahmoud Ahmadinejad escaped an assassination attempt on Wednesday when a homemade grenade hit one of the vehicles in his motorcade in the city of Hamedan in western Iran.
Ahmadinejad was in Hamedan to deliver a speech.
The explosion injured several journalists from al-Arabiya who were accompanying the president to broadcast his speech live on state television.
Neither Ahmadinejad nor his vehicle was harmed by the grenade, which hit about 100 meters (yards) away.
Police arrested one suspect in the assassination attempt, the conservative Iranian website Khabaronline.ir reported.
Al-Jazerra quoted presidential sources who said a firecracker had gone off near the motorcade. The sources also said journalists accompanying the president had not witnessed any assassination attempt.
Later, Press TV, Iran's English-language broadcast, quoted Ahmadinejad's office stating that "no such attack had happened."
The state-run IRNA news agency also made no mention of the assassination attempt in its report.
Ahmadinejad told the crowd he is interested "in dialogue [with Western nations] based on justice and mutual respect" and was willing to meet with U.S. President Barack Obama on the sidelines of September's U.N. General Assembly meeting in New York, according to IRNA,
AP contributed to this report.