Electricity supply may be restored to four crippled reactors at the Fukushima Number One nuclear power plant as early as Saturday.

Tokyo Electric Power Company, the operator of the nuclear power plant, says it expects electricity to be supplied to the four reactors on Saturday and to the other two reactors on Sunday. A company official says diesel generators have already resumed power supply to Number 5 and 6 reactors.

Japanese engineers have successfully attached a power cable to the exterior of the Fukushima Number One nuclear power plant. The move is part of efforts to pump in water to cool off the overheating reactor.

Cooling functions at the Fukushima complex were crippled by a massive earthquake and tsunami Friday of last week.

Ahead of securing the electricity supply, the engineers of Tokyo Electric Power Company on Saturday are focusing their efforts on laying one-thousand-500 meters of cable inside the power plant.

After concluding the cabling work, the electric company plans to review whether any of the cooling equipment has sustained damage before operating the cooling systems of the reactors in the nuclear power plant. The company plans to first operate the cooling systems of reactor number two then numbers one, three and four.

Meanwhile, General Electronic Company, which designed the Fukushima plant, sent a group of technicians to Japan to provide assistance.

The U.S. company has denied allegations that there were weak points in the plant's design.