Instead, Moscow and Kyiv have been drawn into an escalating duel of long-range aerial strikes as fighting along the roughly 1,250-kilometer (780-mile) front line in eastern and southern Ukraine has slowed, restricted by large numbers of drones and ground robots threatening troop movements.

Ukrainian bomber drones were used to drop ground robots behind the Russian frontline in a groundbreaking new 'safari' mission that targeted as many as 3,000 enemy troops.

Russia ​has in recent weeks been ​attacking Kyiv and nearby areas with near constant barrages of the faster and high-flying jet drones that are harder ​to intercept.

A conflict that began with tanks and then artillery is now pivoting around a new generation of drones focused on military, industrial, economic and civilian targets

Moscow's mayor described the wave of drones as the "largest ever" attack on the Russian capital and said there had been damage to a Moscow oil refinery and a residential building.

US intelligence services have warned several European countries about possible upcoming drone attacks courtesy of Russia

Joshua Cammidge, 31, is alleged to have been tasked with locating drone manufacturing sites in Wiltshire.

A Russian drone struck a DTEK vehicle carrying energy workers in Odesa Oblast, killing one employee and injuring another after the vehicle left a substation.