Militants killed at least 11 Iranian security force members and suffered 16 fatalities in attacks on Iran's Revolutionary Guards headquarters in the southeastern province of Sistan-Baluchestan, state media said on Thursday.
The overnight clashes between the Jaish al-Adl group and security forces took place in the towns of Chabahar and Rask, state TV said.
"The terrorists failed to succeed achieving their goal of seizing the Guards headquarters in Chabahar and Rask," deputy Interior Minister Majid Mirahmadi told state TV.
State TV said 10 other security officers were also injured in the fighting in the impoverished region.
Jaish al-Adl says it seeks greater rights and better living conditions for ethnic minority Baluchis in Iran. It has claimed responsibility for several attacks in recent years on Iranian security forces in Sistan-Baluchestan.
The area, which borders Afghanistan and Pakistan, has long been the site of frequent clashes between Iranian security forces and militants as well as drug traffickers.
Iran is a key transit route for narcotics smuggled from Afghanistan to the West and elsewhere.
In December, the militant group attacked a police station in the town of Rask, killing 11 security personnel.
In January, Iran targeted two bases of the militant group in Pakistan with missiles, prompting a rapid military riposte from Islamabad targeting what it said were separatist militants in Iran.
