The news ticker at heute.de was pretty sure about it, saying there are two holes each eight square meters in size in reactor 4.
Of course I can't say how much truth lies in that statement.
The Brazillian news was claiming that a huge nuclear fallout cloud was heading their way and that everyone should stock up on iodine. The Austrian news was claiming that the meltdown was fully under way and that hell on earth was about to be unleashed.
I'd wait until we have clear news about what's going on before making an opinion.
That's talking about the reactor building (i.e. the outer walls). It's not 100% clear but they were at one point demolishing those walls to help vent hydrogen from the building. But I saw anbother source saying an explosion in that building caused the holes.
(Unit 4, BTW, is shut down & stable, but it is the building with the fire in the spent fuel pond)
I'd wait until we have clear news about what's going on before making an opinion.