Members of Iran's Azeri minority have long complained that their rights are stifled. They make up a quarter of Iran's population, but claim the authorities are worried about an uprising by ethnic Azeris, as Tom Esslemont reports from the Azerbaijan-Iran border. By 0900 the border between Azerbaijan and Iran is jammed. Dozens of Azeri men and women with large plastic bags jostle to squeeze through a grey metal gate to passport control - and beyond that, Iran.

Border guards shout at them in an attempt to keep them in line. It fails.