Ukrainian President Volodymyr Zelensky has said that Russia's refusal to agree to a ceasefire is complicating efforts to end the war, BBC reported.

"We see that Russia rebuffs numerous calls for a ceasefire and has not yet determined when it will stop the killing. This complicates the situation," he said in a statement on 'X'. 

On Monday, the Ukrainian leader travel to Washington DC, where US President Donald Trump has said he will urge Zelensky to agree to a peace deal.

Trump has said he wants to bypass a ceasefire in Ukraine to move directly to a permanent peace agreement after his meeting with Russian President Vladimir Putin, according to BBC.