President Mahmoud Ahmadinejad is eager to attend the Olympic Games in London to support Iranian athletes but says that Britain has a "problem" with hosting him.
He would like to be "beside Iranian athletes" in London but the British are unwilling to have him there, Mr Ahmadinejad told the official IRNA news agency.
He did not give details.
Britain is in a stand-off with Iran over its nuclear programme, which the West suspects is aimed at producing an atomic weapon. Iran denies the charge.
Britain in 2011 cut ties with Iran, closing its embassy in Tehran after militant Iranian students stormed the mission.
The raid followed a move by Iranian MPs to downgrade relations and allegations of hostile British policies toward Tehran.
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