Two percussion grenades exploded Monday in separate cities in Khuzestan, a southwestern province known for unrest among its Arab population, wounding four people, the official Iranian news agency reported.
The grenades went off in restrooms in local government offices in Abadan and Dezful, the Islamic Republic News Agency said, citing official sources.
The agency described the blasts as "terrorist acts," saying they wounded two people in each town.
Several bombs exploded in the capital of Khuzestan, Ahvaz, last year and in January.
An Iranian Arab insurgent group, the Arab Struggle Movement for the Liberation of Ahvaz, claimed responsibility for the Jan. 24 blasts, which killed six people and wounded 46.
The Iranian goverment blamed the bombings on Britain, which denied any involvement.
Britain has thousands of troops in southern Iraq, across the border from Khuzestan, serving in the U.S.-led multinational force, reports the AP.
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