A Ukrainian drone attack in Yaroslavl Region, northeast of Moscow, killed a child and wounded three people, regional governor Mikhail Evraev said, quoted by "Reuters".
Damage was also caused to several residential buildings and a "commercial facility".
"A child who was in one of the private houses in the suburban area of Yaroslavl Region at the time of the attack died," Evraev told Telegram.
"His parents are hospitalized in serious condition. A woman living in a neighboring house was also injured. They are receiving all necessary medical care," he added.
He said Russian air defense units had repelled more than 30 Ukrainian drones during the attack.
The Russian Defense Ministry reported that a total of 155 Ukrainian drones had been repelled and destroyed overnight over a number of Russian regions, including Moscow Oblast.