The following YouTube videos trace the unrest in Ahwaz, an Arab majority city in Iran's oil-rich Khuzestan province. Mehdi Karroubi had topped the poll in the province in 2005, with Ahmadinejad in a distant third place. This year, Ahmadinejad came first with an overwhelming majority - a result that the electorate regards as impossible.
9/10 June: Anti-Ahmadinejad supporters come out onto the streets of Ahwaz City in large numbers ahead of the presidential election
13 June: Riot police and Bassij attack pro-Mousavi demonstrators in Ahwaz City streets
From 13 June: Demonstrations and riots break out in Ahwaz after election result is announced