[9:54 p.m. ET, 11:54 a.m. Tokyo] A meltdown may have occurred at at least one nuclear power reactor in Japan, the country's chief cabinet secretary, Yukio Edano, said Sunday.
He also said that authorities are concerned over the possibility of another meltdown at a second reactor.
"We do believe that there is a possibility that meltdown has occurred. It is inside the reactor. We can't see. However, we are assuming that a meltdown has occurred," he said of the No. 1 reactor at the Fukushima Daiichi nuclear facility. "And with reactor No. 3, we are also assuming that the possibility of a meltdown as we carry out measures."