Overnight Russian drone attacks sparked a fire in Kyiv and injured a woman and damaged several houses in the northeastern city of Sumy, Ukrainian officials said on Monday. The Ukrainian military said on Monday that it had shot down 61 out of 83 drones with 22 more likely downed by electronic warfare.

Russian forces have escalated their drone attacks on Ukrainian cities, notably Kyiv and Sumy, resulting in significant damage and civilian casualties. In Kyiv, a drone strike ignited a fire in a non-residential building;

Sky News analysis shows an increase in Ukrainian drone strikes against Russian oil depots and other facilities linked to oil production over the past three months - with Kyiv hitting targets hundreds of miles into Russian territory in defiance of air defences.