Iran protests: Fury over police sex assault video- By Pouya Ghorbani- BBC Persian Social MediaA video of anti-riot forces in Iran sexually assaulting a female protester whilst trying to arrest her has provoked fury on social media.The protests erupted last month when anger over the death in police custody of 22-year-old Kurdish Iranian Mahsa Amini boiled over.Tehran's Police Public Relations office has said the incident is being investigated, state news agency Irna reported.The police statement does not give details of what happened, but says that "enemies using psychological warfare tried to cause public anxiety and incite violence".The fact that the incident happened in public has led human rights activists to question what security forces might also be doing behind closed doors."