The strike on Boeing’s building also adds to a growing list of Russian attacks on industrial facilities, including repeated strikes on the Antonov plants, power plants and substations, and defence production sites. Ukrainian officials say the attacks are part of Moscow’s effort to degrade the country’s ability to manufacture and repair weapons.

Russia is advancing around Kostyantynivka and in the Sumy region with small, fast-moving units as both sides try a new tactic of using motorcycles and civilian cars to quickly cross open terrain.