One person was killed and five wounded in an attack on a paramilitary Basij base in southeastern Iran, state television reported on Saturday.
The report gave no further details about what it described as a “terrorist incident” in the city of Nik Shahr in the Sistan-Baluchestan province, which has long been plagued by unrest from both drug smuggling gangs and militants.
The province is also where Pakistan-based Baluchi separatists and extremists carry out cross-border raids.
It has a large, mainly Sunni Muslim ethnic Baluchi community, which straddles the border.
The assailants struck a base of the Basij militia in the town of Nikshahr, some way from the border, IRNA said.
“Morteza Ali-Mohammadi was martyred in the incident and the five critically injured have been transferred to the hospital,” Nikshahr's prosecutor Mohsen Golmohammadi told the semi-official YJC news agency.
The extremist Jaish al-Adl (Army of Justice), which is blacklisted as a terrorist group by Iran, claimed responsibility for the raid on social media.
State media said only that it was a “terrorist” attack, and held no particular group responsible.
Jaish al-Adl was formed in 2012 as a successor to the Sunni extremist group Jundallah (Soldiers of God), which waged a deadly insurgency against Iranian targets over the previous decade.
It also claimed responsibility for two bombings on Wednesday which wounded several police officers in the provincial capital Zahedan.