Iran has denied reports of an attack on president Mahmoud Ahmadinejad that involved a homemade explosive device during a visit to the western city of Hamadan today.
Earlier, a source had said Mr Ahmadinejad's convoy was targeted as he was travelling from Hamadan's airport to give a speech in a local sports arena. According to the source, the president was unhurt, but others had been injured in the explosion. One person was arrested.
"There was an attack this morning. Nothing happened to the president's car," the source told Reuters. "Investigations continue . . . to find out who was behind it."
Mr Ahmadinejad, who has cracked down on opposition since a disputed June 2009 presidential election, appeared on live Iranian television at the sports stadium in Hamadan. He was apparently well and made no mention of any assault.
The populist, hardline Mr Ahmadinejad has accumulated enemies in conservative and reformist circles in the Islamic Republic as well as abroad.
Al Arabiya television reported an attacker had thrown a bomb at Mr Ahmadinejad's convoy before being detained. Dubai-based Al Arabiya cited its own sources as saying the bomb had hit a car carrying journalists and presidential staff.
There was no immediate claim of responsibility.
On Monday, during a speech to a conference of expatriate Iranians in Tehran, Mr Ahmadinejad said he believed he was the target of an assassination plot by Israel. "The stupid Zionists have hired mercenaries to assassinate me," he said.
Mr Ahmadinejad's government is facing economic pain as new foreign sanctions imposed over Iran's disputed nuclear energy programme bite on the world's fifth biggest oil exporter.
One of Mr Ahmadinejad's trademarks has been constant travel around his vast country to deliver provocative speeches before outwardly adoring crowds who shout "death" to Iran's foes.
The oil market initially reacted calmly to reports of the attempted attack.
Meanwhile, Baqer Moin, a London-based Iran expert, said Hamadan was a stable area without any notable ethnic or local tension. "Let's wait and see who they accuse, an internal or an external enemy," Mr Moin said.
Several armed groups opposed to the government are active in Iran, mostly fighting in the name of ethnic Kurds in the northwest, Baluch in the southeast and Arabs in the southwest.
The banned Mujahideen Khalq, listed by the United States as a terrorist group, carried out several anti-government attacks after the 1979 Islamic revolution. It was blamed for two 1981 bombings that killed dozens of senior officials in Tehran, including the president and prime minister.
Shahin Gobadi, French-based spokesman for the Mujahideen, now part of an opposition coalition known as National Council of Resistance of Iran, denied involvement.
Mr Ahmadinejad recently sought to isolate rival political factions by declaring that "the regime has only one party, which is the velayat" - a reference to Shia Islam's hidden Imam, for now represented by Supreme Leader Ayatollah Ali Khamenei.
Just as combative towards external pressure, the president derided sanctions over Iran's nuclear programme as "pathetic" and vowed to pursue what Iran says is a quest for nuclear energy, not weapons as the West believes.
On Monday, Mr Ahmadinejad called on US president Barack Obama to face him in a televised one-on-one debate to see who has the best solutions for the world's problems.
Mr Ahmadinejad, backed by the elite Revolutionary Guards, crushed street protests that greeted his disputed re-election in June 2009, although he has yet to silence losing reformist candidates Mirhossein Mousavi and Mehdi Karoubi.
The president, first elected in 2005, also seems bent on displacing an older layer of conservative leaders and clerics whose influence dates back to the 1979 Islamic Revolution.
Many of them resent the rising economic and political power of Mr Ahmadinejad's allies in the Revolutionary Guards and are disconcerted by his mystical devotion to the hidden Imam.
Conservatives such as parliament speaker Ali Larijani, a fierce critic of Mr Ahmadinejad's economic policies, have tacitly urged Khamenei, the Islamic Republic's ultimate authority, to rein in the fiery president - but to little visible effect.
Reformists have blamed state "discrimination" for creating discontent that has emboldened a Sunni Muslim rebel group behind two suicide bombings that killed at least 28 people in a Shia mosque in southeastern Iran last month.
Reuters