Saturday 12th March, 06:28 PM JST
Four people have been injured in an explosion that occurred at the No. 1 reactor of the quake-hit Fukushima No. 1 nuclear power plant, the operator Tokyo Electric Power Co. said Saturday.
The explosion was heard at 3:36 p.m. following large tremors and white smoke was seen at the facility in Fukushima Prefecture, the company said.
The four workers were working to deal with problems caused by a powerful earthquake that hit northeastern Japan on Friday.