Eleven people have died in a night-time attack on a police station by suspected members of a separatist group, according to Iran state TV.
Senior police officers and soldiers were killed and others injured, said Ali Reza Marhemati, deputy governor of Sistan and Baluchistan province.
He said some of the attackers were killed by police.
It happened around 2am in the town of Rask, in southeast Iran, about 875 miles (1,400km) from the capital Tehran.
State TV blamed the attack on the Jaish al Adl separatist group.
In 2019, it claimed responsibility for a suicide bombing on a bus that killed 27 members of Iran’s Revolutionary Guard.
In recent months, militants and small separatist groups in the mainly Sunni region have attacked police stations as part of an insurgency.
Sistan and Baluchestan province is one of the least developed areas of Iran.
It was the site of heavy crackdowns following protests over the death in custody of Mahsa Amini, who had been detained in Tehran for allegedly not wearing her veil properly.
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