Fifteen people have been shot dead and dozens wounded in an attack at the Shah Cheragh mausoleum in the Iranian city of Shiraz.
Initial reports said three assailants had fired at pilgrims and staff at the entrance Shia Muslim shrine, and that two had been arrested by police.
The so-called Islamic State group (IS) said it had carried out the attack.
State media also alleged that “takfiri terrorists” – a label Tehran uses for Sunni Muslim militants like IS – were responsible.
President Ebrahim Raisi vowed a swift and firm response.
