"All in all, the blast killed 50 people," he said.
Twelve people are in hospitals and five of them are in grave condition.
Bodies of 50 people were found under the debris. 43 victims have been identified. Two women, aged 18 and 60, died in hospital.
According to Viktor Beltsov, rescuers have already cleared 85 per cent of debris and are working at the first floor level now.