Russia has battered Ukraine overnight with its largest drone attack since the war began, Ukraine’s military said Sunday, as Moscow intensified its military assault despite holding direct peace talks with Kyiv Friday.

Units of the Unmanned Systems Forces of Ukraine reported destroying 100 enemy attack drones using interceptor drones. The tactic involves a breakthrough method that allows effective and cost-efficient downing of Shahed drones without using expensive air defense missiles.

A Russian drone strike hit a passenger bus in northeastern Ukraine on Saturday, killing nine people and injuring four others, according to Ukrainian officials.