The Iranian parliament began the inauguration of Mahmoud Ahmadinejad for a second term as president today.
Parliament speaker Ali Larijani opened the ceremony, after a cleric recited verses from the Koran.
Mr Larijani said the inauguration would “open a new chapter” for Iran.
Iran’s opposition has claimed Mr Ahmadinejad stole the vote in the June 12 presidential elections and there have been massive street protests that have shaken the country’s religious leadership.
At least 30 demonstrators were killed or wounded in the uprising.
Opposition groups had called protesters to the streets today to coincide with the inauguration.
A massive security operation was expected outside parliament and other areas of the capital.
Mr Ahmadinejad took the oath, pledging to protect the constitution and frontiers of Iran.
Hundreds of police were deployed around the parliament building, while a tube station nearby was closed to the public.