Ukrainian drone ‌strikes killed three people on Tuesday in Russia’s border region of Belgorod and 19 more ​were injured in an attack on a bus denounced by the Foreign Ministry in Moscow.

Regional authorities said a drone strike on a business in a village near the border killed two people. ‌Another person was killed ‌in an attack ​on ‌a ⁠town ​outside the ⁠region’s main city, also called Belgorod.

The bus came under fire in the town of Shebekino, near the Ukrainian border, and all but one of those injured were sent ⁠to hospital for treatment.

Moscow has accused ‌Ukraine of ‌staging systematic attacks on buses ​in different ‌Russian regions.

Russian Foreign Ministry spokesperson Maria ‌Zakharova said the latest strike showed Ukraine was directing attacks on public transport “with a maniacal persistence, taking revenge on ordinary people ‌for growing failures at the front.”

Russian-installed authorities in occupied ⁠parts ⁠of eastern Ukraine’s Donetsk region said five people were injured on Tuesday in what they said was a Ukrainian drone strike on a bus. Russian authorities also blamed Ukraine for an attack last month on a bus carrying Belarusian children to a holiday site, which killed a ​woman and ​injured six children.

Ukraine’s military rejected the accusation as false.