Moscow, Mar 16 (Prensa Latina) Russian Air defence systems shot down 31 Ukrainian combat drones in four regions in the southwest of the country in the past 24 hours, the Ministry of Defence reported today. According to the defence ministry's official Telegram page, 16 UAVs were intercepted in Voronezh province; nine in Belgorod province; five in Rostov province; and one in Kursk province.