Russia battered Ukraine overnight with its largest drone attack since the war began, Ukraine’s military said Sunday, ahead of an expected phone call between US President Donald Trump and Russian President Vladimir Putin on ending hostilities.

President Donald Trump is hoping separate phone calls with Russian leader Vladimir Putin and Ukrainian President Volodymyr Zelenskyy will make progress toward a ceasefire in the war in Ukraine.

President Trump expressed his hopes for a “productive day” Monday — and a cease-fire — in a social media post over the weekend. His effort will also include calls to NATO leaders.