More Smoke At Melting-Down Reactor --Radiation Levels 300 Times Normal South of Plant 16 Mar 2011 Smoke or steam was seen again on Thursday morning at three reactors in Japan. A top U.S. nuclear official says there is no water left in one nuclear reactor that is melting down. A Japanese oficial disputes that report. The Japanese public TV network NHK said more smoke was seen at the Fukushima plant at 7:30 a.m. local time (or 6:30 p.m. ET) at units 2, 3 and 4. NHK also said police armed with firehouse may drive up to the injured reactors and try to flood them with water. Gregory Jaczko, head of the U.S. Nuclear Regulatory Commission, told Congress on Wednesday afternoon that unit 4 at the Fukushima nuclear plant in Japan had no water left in its containment pool, based on information obtained by the U.S.