Hadis Najafi: Iran police fire on mourners for female protester - witnesses- By David Gritten & Khosro Kalbasi Isfahani- BBC News & BBC MonitoringIranian security forces have opened fire on crowds near Tehran marking the 40th day of mourning for a woman shot dead while protesting, witnesses say.It posted other videos showing people throwing stones at the officers through the vehicle's broken windows.However, thousands of people apparently managed to make their way round the roadblocks and converge on the site.Norway-based Iran Human Rights said on Wednesday that 277 people, including 40 children and 24 women, had been killed by security forces in a violent crackdown launched in an attempt to quell the protests.It cites the provincial police chief as saying Sajjad Shahraki was targeted by unknown armed men."