Russian news agency ITAR-TASS reports there were bars on the windows of the single-storey hospital building which is located about 70 miles outside Moscow. Some patients apparently died while trying to make it to the main entrance to escape. Many others died in their beds.
More top news
Researchers in Boston have created a 'robot cheetah' that they hope will be able to reach top speeds of 30mph.
UK trials of a vaccine for the Ebola virus began today - but some experts complain that the response has been a long time coming.
This September has been the driest so far for more than 50 years, Met Office figures have revealed.