REPUBLIKA.CO.ID, BENGHAZI -- Libya's eastern city of Benghazi has been plunged into darkness as clashes between pro-government forces and Islamist fighters have knocked out three of five power stations serving the city, the country's second largest, officials said on Monday.

Power has been off for 16 hours a day in the port city where forces loyal to the official government based in the east have been fighting Islamist groups for 15 months in a battle that has turned parts of Benghazi into ruins.

A spokesman at state power firm GECOL in Benghazi said output at the gas-fired main power plant was still stable at 650 megawatts on average a day, but three sub-stations distributing electricity inside the city had been damaged.

He said ongoing fighting made it impossible to reach the damaged stations, adding that the state power firm was running out of spare parts. A turbine needed to be repaired but a German firm that used to do the maintenance work had pulled out and was refusing to send any engineers to Benghazi.