A roof at the Chernobyl nuclear power plant has collapsed under the weight of snow. There are no immediate radiation concerns. The Emergencies Ministry said “there were no safety breaches” and no one was injured when the roof of an engine room caved in. The accident affected an area covering 600 square metres close to the concrete sarcophagus that seals the reactor from the outside world. The contaminated land around the plant is designated a depopulated “exclusion zone” following the April 1986 explosion, the worst nuclear power disaster in history.