It is noted that the children found a gas mask on the territory of an abandoned building in the village of Sizy Bugor, Volodarsky district.
"According to preliminary information, three boys and a girl picked up a gas mask and elements for it, as a result of manipulations with which there was a cotton," RIA Novosti reported.
Two minors with burns of 7% and 10% of the skin surface were hospitalized in a moderate condition.
Earlier it became known that investigative officers are conducting an inspection in Tyumen after a fire in which three children were injured.