Iran state radio says Tehran calm overnight

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on their ability to report, film or take pictures in Tehran. Iranian security personnel form up on a street in Tehran in this undated photo uploaded onto Twitter June 21, 2009.

TEHRAN (Reuters) - Iranian state radio said on Monday that no unrest broke out in Tehran overnight and the capital had been calm for the first time since a disputed June 12 presidential election.

"Tehran last night witnessed the first night of calm and peace since the election," state radio said.

On Sunday evening, witnesses told Reuters shooting was heard in two northern districts of Tehran, which are strongholds of defeated presidential election candidate Mirhossein Mousavi.

State television earlier on Sunday said at least 10 people were killed during street clashes in downtown Tehran the previous day.

Official results released on June 13 showing hardline President Mahmoud Ahmadinejad had won re-election by a landslide against Mousavi sparked the most widespread street unrest in Iran since its 1979 Islamic revolution.

Mousavi says the election was rigged, a charge the authorities reject. Mousavi, a moderate advocating better ties with the West, on Sunday called on his supporters to continue election protests but to show restraint.