TSEMENTNY, Russia, Oct. 7 (UPI) -- The number of children stricken by food poisoning in the Sverdlovsk region of Russia has risen to 77, the region's Emergencies Ministry said.
Forty-eight of the children, along with three adults, have been hospitalized for treatment, ITAR-Tass reported Friday.
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The outbreak occurred at a kindergarten in the village of Tsementny in the Nevyansk district.
Salmonellosis, possibly a result of low-quality food products, is a preliminary diagnosis in the mass poisoning, the region's Health Ministry said.
An investigation is under way, officials said.