Three people, including two children, were killed in a Ukrainian drone attack in the western Russian region of Kursk, Governor Roman Starovoyt has said on his Telegram channel.
Starovoyt said that a drone dropped an explosive device on a car in which the civilians were travelling in the village of Apanasovka, a few kilometres from the Ukrainian border.
Later, Starovoyt warned of new drone attacks. A drone alert was also triggered in the neighbouring Voronezh region.
Russia, which has been waging war against its neighbour Ukraine for more than two years, is increasingly coming under fire - particularly in the border regions.
However, the damage and number of casualties are insignificant compared to the carnage in Ukraine.