Iran protests: riot police clash with students at Sharif university

Unverified social media videos show security forces firing teargas amid reports some students are trapped in campus car park

Iranian security forces have clashed with students at a prominent university in Tehran, social and state media reported, in the latest sign of a deadly clampdown on nationwide protests that were ignited by the death in custody of a young woman.

The anti-government protests, which began at 22-year-old Mahsa Amini's funeral on 17 September in the Kurdish town of Saqez, have spiralled into the biggest show of opposition to Iran's authorities in years, with many calling for the end of more than four decades of Islamic clerical rule.