he operator of the Fukushima Daiichi nuclear power plant is trying to identify where highly radioactive water from the No.1 reactor's containment vessel is flowing to, as the reactor is believed to have suffered a meltdown.

Tokyo Electric Power Company, or TEPCO, says the meltdown at the No.1 unit created holes in the reactor and damaged the containment vessel.

A large amount of highly radioactive water is believed to be leaking out, but it is not known where it is flowing.

TEPCO says the water could be flowing into the basement of the reactor building, but that workers cannot enter the site due to fear of high levels of radiation.