Iran- Mahmoud Ahmadinejad has been sworn in for a second term as Iran's president, after weeks of post-election unrest.

In an address after the ceremony, he criticised foreign powers who have cast doubt on the validity of the election, saying Iran would resist them.

Opposition supporters protesting outside parliament were met by hundreds of riot police.

Germany, France, Britain and the US all said they would not be sending letters of congratulation to Mr Ahmadinejad.

At least 30 people died during the street protests which followed the 12 June poll.

Mr Ahmadinejad now has two weeks to form a government that must then be approved by parliament.