Activists of the CPI (M) and its affiliated A P Rythu Sangham staged dharnas in front of electricity sub-stations in various mandals all over the district on Saturday in protest against the erratic power supply and unscheduled power cuts. Protesters led by the party senior leader and former MLA Sunnam Rajaiah laid siege to the AP Transco office in Bhadrachalam. The agitated cadres raised slogans denouncing the power cuts. Speaking on the occasion, Mr Rajaiah alleged the government had miserably failed to tackle the power situation and provide assured power supply. In Garla, the CPI (M) cadres staged a dharna in front of the electricity sub-station in the mandal headquarters.