Regime forces and pro-government thugs fired tear gas and live ammunition on protesters in the villages of Daih, Ma'ameer and a village near Sitra.
Witnesses say regime forces are firing on homes and private properties and gunshots can be heard from different parts of the villages.
In Diah, Bahraini troops have reportedly used a fearsome Apache helicopter gunship, designed to destroy tanks on a battlefield, to disperse protesters.
Activists of Bahrain's 14th of February revolutionary movement have urged Bahrainis to fight back if they are attacked by regime forces on the "Day of Sacred Defense."
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