Three Iranian security personnel and three militants have been killed in a clash in the southeast of the country near the border with Pakistan, Iran’s state media report.
Reports said the fighting took place in the border city of Mirjaveh in Sistan-Baluchistan Province late on June 25.
Iran's Islamic Revolutionary Guards Corps (IRGC) said its ground forces killed a "terrorist group" as it tried to enter Iran.
A Sunni militant group called Jaish al-Adl (Army of Justice) claimed that its fighters killed 11 Iranian security personnel.
None of the casualty figures could be independently verified.
Iranian security forces frequently clash with militants and drug traffickers in Sistan-Baluchistan. The province lies on a major smuggling route for Afghan opium and heroin.
The population of the province is predominantly Sunni, while the majority of Iranians are Shi’a.