A suicide bombing attack occurred in a violatile area of Iran targeting the Revolutionary Guard.
Twenty members of Iran's elite Revolutionary Guards were killed in a suicide attack in the southeast of the country, Fars news reported Wednesday.
A suicide car bomb targeted a bus carrying members of the Guards also wounded 10 other soldiers, the Guards said in a statement.
The province, which lies on a major opium trafficking route, has seen occasional clashes between Iranian forces and Baluch separatists, as well as drug traffickers.
The attack happened on the road between the cities of Zahedan and Khash, a volatile area near the Pakistan border where militant groups and drug smugglers frequently operate.
The group Jaish al Adl has claimed responsbility for the attack and has been responsible for multiple attacks in Iran including one consisting of two bomb explosions on a police station in the same city of Zahedan, injuring three police officers.
A video posted by Fars showed blood and debris on the highway at the site of the attack.
An attack by gunmen on a military parade in the city of Ahvaz last fall killed at least 25 people, including 12 members of the Guards.