Six children have sustained injuries of various degrees as a result of the explosion of an unidentified object.
The incident took place on a playground in the village of Pashena Balka, Dnipropetrovsk Region at around 8 p.m. local time on 1 July.
According to the regional police, six children aged 4 to 16 were hurt. One of them is in a grave condition.
Police are checking the area.