At least three children were among 27 people wounded as a result of a Russian drone attack on Ukraine's second-largest city of Kharkiv overnight that damaged apartments and a kindergarten, Ukrainian authorities said on Monday.

With their dense mesh, the nets can tangle drone propellers. It’s a simple but effective countermeasure that reflects how low-tech means can blunt high-tech weapons in the war.

Russia’s surging defence industry, bolstered by an expanded missile plant in Votkinsk and rapidly expanding supply chains, could soon allow Russia to fire 1,000 missiles and drones at Ukrainian cities in a single night.