Four members of Iran's security forces have been killed by an explosion set off in a booby-trap attack by rebels near the Pakistani border, state radio reported.
The report late on Friday said the four policemen were buried the same day in the city of Zahedan in southeastern Sistan-Baluchestan province, but it did not specify when they were killed. Two others were wounded in the blast, it said.
Iranian security forces regularly clash with heavily armed drug smugglers and bandits in the southeast border area, which is home to Iran's mostly Sunni ethnic Baluchis.
Last month, state media said several members of Iran's border security forces were killed in an ambush near the Pakistani border.
In December, Shi'ite-dominated Iran said the Sunni rebel group Jundollah (God's Soldiers) had killed 16 police hostages who were abducted from a checkpoint in Sistan-Baluchestan in June. Tehran has said Jundollah's head, Abdolmalek Rigi, is part of the Sunni Islamist al Qaeda network.