Coverage on American cable news channels is now spotty.
I did see a FOX reporter in Japan say that they have detected what he called neutron beams which is indicative of Plutonium radiation and that it would point to a release that typically would come from a reactor.

Dark smoke from reactor 3 could suggest a core breach of some kind and prompted a worker withdrawl. For the little info we are given it could just as esily be a lubricant fire.

One FOX reporter speaking of finding neutron beam radiation (which is not a scientific term to my knowledge) does not make it true.