Russia has vowed a "tough response" to Ukraine's latest reported attacks on several regions in the country, in addition to the Moscow-controlled part of Ukraine's eastern Donetsk region, the BBC reported.

Russian Foreign Ministry spokeswoman Maria Zakharova has said in a statement: "The Kyiv regime is continuing its terrorist activity with the sole purpose of intimidating the peaceful population of Russia."

She adds that Ukraine "understands perfectly well" that the recent attacks "make no sense from a military point of view".

Zakharova mentioned several attacks in the past 24 hours, including what she said was a "massive" overnight strike on the regional capital Kursk.

Earlier, the local governor for Kursk said 13 people had been injured when the wreckage of a Ukrainian missile fell on the multi-story building in the city.