Iran protests: Schoolgirls heckle paramilitary speaker- By David Gritten- BBC NewsA new video posted online appears to show schoolgirls heckling a member of Iran's feared paramilitary Basij force, after anti-government protests sweeping the country spread to the classroom.In another clip, reportedly filmed in the nearby city of Karaj, schoolgirls are seen screaming and running from a man, thought to be a member of the security forces in plainclothes, who is driving a motorcycle along a pavement.The unrest was triggered by the death of Mahsa Amini, a 22-year-old woman who fell into a coma hours after being detained by morality police on 13 September in Tehran for allegedly breaking the strict law requiring women to cover their hair with a hijab, or headscarf.Monday also saw the Supreme Leader, Ayatollah Ali Khamenei, break his silence on the unrest and give his full backing to the security forces, which have been accused by human rights groups of killing dozens of people.In separate development on Wednesday, BBC Persian reported that a death certificate issued by a cemetery for Nika Shakarami, a 16-year-old girl who went missing after joining protests in Tehran on 20 September, stated that she had died after suffering "multiple injuries caused by blows with a hard object"."