Air defense systems are on alert for Unmanned Aerial Vehicles (UAVs) in Gatchina, near Saint Petersburg, and across the Republic of Tatarstan. Alerts were issued via the "Радар ВРВ • Оповещения по тылу" system, indicating a direct threat of UAV activity in these regions. Further details regarding the specific nature or origin of the reported UAVs have not been immediately disclosed by authorities.