Ukrainian security services have stepped up drone and sabotage operations against Russian combat aircraft and submarines this month, in what analysts see as one way to combat incessant Russian missile strikes against cities and energy infrastructure.

According to ⁠witnesses a car detonated, Baza and SHOT, which have sources ​in Russia's law enforcement agencies, reported. Reuters was not able to independently verify the reports. There was no official confirmation from Russian ​authorities about the incident.