Iran''s Fars news agency says that President Mahmoud Ahmadinejad will not attend the African Union summit in Libya as was expected.

In a brief statement, the semiofficial news agency reported that the president''s visit to Libya — which was supposed to start Wednesday — has been canceled. No reason was given.

The trip would have been one of Ahmadinejad''s first since his disputed re-election earlier this month.

The opposition has claimed the election was a fraud, and Iran has been shaken by widespread protests challenging Ahmadinejad''s victory.

The three-day heads of state AU summit opens Wednesday in the coastal city of Sirte, east of the capital, Tripoli.