A plant spokesman says workers have been evacuated from Japan's tsunami-stricken nuclear complex after gray smoke was seen rising from one of its reactors.

Tokyo Electric Power Co. spokesman Hiroshi Aizawa said the company is investigating after the smoke was seen rising from the spent fuel storage pool of Unit 3.

As reported by The Associated Press, plant officials have been battling to cool reactors and spent fuel pools to bring the radiation-leaking plant under control after it was damaged in the massive March 11 earthquake and tsunami that devastated northeast Japan.