Water park collapse At least 24 are dead
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6.01 News: Clare Murphy reports on the disaster at a Russian water park where a roof collapsed
Prosecutors suspect faulty construction or maintenance could be to blame.
Rescue teams, working in freezing conditions, are still searching for survivors.
A number of people are still unaccounted for.
Reports from Moscow say that children are among the 28 people who are so far known to have died.
There is speculation that the weight of snow on the structure's dome may have caused its collapse.
Russian officials have ruled out terrorism.
Police say the number of dead is expected to rise as more people are believed still to be trapped under the rubble in temperatures that are well below freezing.
