On the night of December 3, monitoring resources reported an increased threat from unmanned aerial vehicles in Russia's central and southern regions. Alarms were also recorded in the Ulyanovsk, Kursk, Oryol, Bryansk, Smolensk, and Kaluga regions.

According to the Kupol Rossii Telegram channel, a warning was issued for the Ulyanovsk Region at 0:16 AM Moscow time. Two minutes later, at 0:18 AM, the danger spread to the Kursk and Oryol Regions. At 0:23 AM, the alert was issued in Rybinskiye Budy in the Kursk Region. At 0:24 AM, signals were sounded in Starodub and adjacent areas of the Bryansk Region, as well as in the Smolensk and Kaluga Regions.

Residents of the regions have reported the sounding of sirens, but there is no official information yet about the consequences or the operation of air defense systems.