The Washington-based Institute for the Study of War noted that cooperation with China has allowed Russia to bypass Western sanctions on imports of electronics for drone production. Ukraine’s military intelligence estimates that Russia receives up to 65% of components for its Geran drones from China. Beijing rejects the claims.

Deaths have been reported on either side of the border, just hours after a third round of ceasefire talks took place in Turkey.

Ukraine has occasionally targeted the Russian capital, but has doubled down on drone strikes on Moscow in recent days.