Security forces shot dead more than 90 people at protests after weekly prayers on September 30 in the provincial capital Zahedan, on Iran's southeastern border with Pakistan, said Oslo-based group Iran Human Rights (IHR)."Death to Khamenei," chanted men who emerged from mosques in Zahedan after Friday prayers, in a video published by IHR.It says around a third of them were killed in Sistan-Baluchistan, including at least 92 who died on September 30 -- in a massacre activists have dubbed "Bloody Friday".Iran's Tasnim news agency said a week of appeals by "counter-revolutionaries" to create trouble 40 days after the Zahedan incident had failed.'Chant Amini's name'The crackdown has mainly involved riot police, the Revolutionary Guards and their Basij paramilitary force."