Siberian virus outbreak spreads
Russia's chief sanitary officer Gennady Onishchenko said the outbreak was not linked to China's enterovirus epidemic.
Doctors say the virus can cause a range of diseases including meningitis, which could have been the cause of the two deaths.
The head of the nursery has been charged with negligence and the nursery itself is under quarantine.
The authorities predict more people will be detained in connection with the incident.