TEHRAN- A partial recount of Iran's disputed June 12 presidential election began Monday, al-Alam state television reported.

Iran's top legislative body, the Guardian Council, had offered to recount a random 10 percent of the votes. But defeated opposition candidate Mirhossein Mousavi has rejected this, saying the whole election should be annulled.

Recounting had started in 22 Tehran districts as well as in provinces, al-Alam said.

Official results released a day after the June 12 election showed hardline President Mahmoud Ahmadinejad won by a landslide, sparking days of street protests by supporters of Mousavi, who says the vote was rigged.

The 12-member Guardian Council is to give its final verdict on the election and this could happen later Monday. It has repeatedly ruled out annulling the vote, saying it has found no major irregularites.

The disputed poll and its turbulent aftermath have exposed splits in Iran's political establishment and plunged the country into its deepest crisis since the 1979 Islamic Revolution. State media say 20 people were killed in post-election violence.

(Reporting by Parisa Hafezi; writing by Fredrik Dahl; editing by Ralph Gowling)