At least one person has been killed after Russia launched its largest drone attack on Ukraine since the beginning of its invasion, Ukrainian officials said Wednesday, just hours after US President Donald Trump pledged more military support for Kyiv and accused his Russian counterpart Vladimir Putin of throwing “bullsh*t” over peace talks.

Facing a numerically superior foe, Ukraine is under pressure to replenish its ranks on the battlefield where, after three years of war, recruitment is already a challenge.