Huge section of roof covering Chernobyl nuclear reactor which exploded collapses under the weight of snow

Officials immediately denied any threat of radiation even though the accident involved a cover on part of the workings of Reactor Number 4 which exploded in 1986 in the world's worst atomic disaster.

'There are no safety hazards. The radiation situation at the plant and in the exclusion zone is normal. No one was hurt,' said the administration at the former Soviet plant.
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