Armed men attacked a Shia Muslim shrine in the Iranian city of Shiraz on Wednesday, killing at least 15 people, state news agency IRNA said, as security forces clashed with protesters marking 40 days since the death of Mahsa Amini in custody. IRNA described the attackers as “takfiri terrorists”, a label used by officials in predominantly Shia Muslim Iran to refer to hardline, armed Sunni Islamist groups. The attackers were in a car and shot at pilgrims and staff at the entrance to the shrine of Shah Cheragh, the agency quoted witnesses as saying. Police arrested two of the three “terrorists” a…