Tribesmen in Marib governorate attacked on Tuesday evening electricity lines in Mabrib in protest at a death sentence issued against al-Qaeda suspect by a Yemeni court.
The attack led the suspension of the gas-powered station and plunge the capital Sana'a and other cities in darkness after weeks of improvement in power service.
A Yemeni court specialized in terrorism affairs sentenced Mubarak Hadi al-Shabwani, 25 years, to death.
The court accused the defendants of affiliation to al-Qaeda and involvement in armed gang that targeted military and security commanders.
Al-Shabwan tribe had signed a document that fines any one who attacks electricity lines about YR 500 thousand.
Yemen's electricity supplies have been damaged many times since the eruption of the eleven-month-old protests. Yemen have lost billions of rials as a result of recurring attacks
Yemeni officials and analysts accused the former regime led by Ali Abdullah Saleh of supporting those saboteurs who target power lines.
Minister of Electricity Saleh Sumai'a has repeatedly alleged that Saleh and his family were behind the attacks against power lines, asking the international community to put pressures on him to leave Yemen.
Power lines were subjected to more than 200 attacks since the outbreak of pro-democracy protests in February 2011, government sources said.
Electricity shortage had led to the paralysis of factories, laboratories, workshops and many service sectors, pushing further Yemenis to unemployment particularly in 2011.