A bomb explosion in the south-eastern Iranian city of Chabahar has killed at least 38 people and injured many more, the official Iranian news agency says.
The blast, reported to be a suicide attack, took place outside the Imam Hossein Mosque, the Irna agency said.
The attack reportedly targeted pilgrims marking Ashura, the Shia mourning day.
The province of Sistan-Baluchistan is prone to unrest, with the mainly Sunni population often claiming discrimination by Shias.
Jundullah
There is no confirmation of who carried out the attack and details remain unclear.
A number of women and children are believed to be among the dead.
Irna quoted the head of the Chabahar Security Council, Ali Bateni, as saying there were two attackers and one had been arrested.
State television reported there had been two explosions but Mr Bateni said there had been only one.
Ashura commemorates the death in the 7th Century of the Prophet Muhammad's grandson. BBC News
