Russia could open new front as Ukraine remains weapons-poor, say officials

A worker removes shards of glass from a broken window of a school gym damaged by a Russian missile attack in Kharkiv [Sofiia Gatilova/Reuters]

Russian forces continued to exploit a window of opportunity to make small, tactical gains during the past week, as Ukraine began to receive parcels of long-delayed US military aid for the first time in weeks.

Ukraine also reported that Russia was building up worrying numbers of troops on its northern border, and prepared to face a potential new front.