Mursi: Syria uprising 'revolution against an oppressive regime'
30 August 2012 Last updated at 22:29 BST
The Non-Aligned Movement (Nam) summit in Tehran seems unlikely to have reaped the diplomatic prestige Iran had been looking for.
On the first day of the summit, UN Secretary General Ban Ki-moon, who has himself been criticised for attending the event, spoke out against Iran's position on Israel.
The Egyptian President, Mohammed Mursi, then attacked the Syrian government, calling the uprising a "revolution against an oppressive regime", causing a walk-out by the Syrian delegation.
James Reynolds reports.