At least three children were among 27 people wounded as a result of a Russian drone attack on Ukraine's second-largest city of Kharkiv overnight that damaged apartments and a kindergarten, Ukrainian authorities said on Monday.

A Russian drone attack on Ukraine's Kharkiv injured 20 people, including three children, damaging apartments and a kindergarten. The attack caused a fire in a residential building. Other attacks occurred in Kyiv and Sumy,

An official said most of the injuries occurred in the city's Shevchenkivskyi district, where several apartments and a kindergarten were hit.