Drone attacks expose Russia's vulnerability

A drone attack targeted on Tuesday a Russian airfield in the border Kursk region. The attack comes one day after attacks on two military airfields deep inside Russian territory which killed three soldiers and injured four others. Russia blamed Ukraine for the attack on the Dyagilevo airfield in the Ryazan region and the Engels airfield in the Saratov region.

Ukraine did not claim responsibility for the attacks, but if Russia's accusations are true, it would be the deepest Ukrainian attack inside Russia since the war started on February 24.

The Saratov region is at least 600 km (370 miles) from the nearest Ukrainian border. Many commentators and analysts have suggested that this would mean the Ukrainian forces are capable of hitting Moscow.