Kyiv, Oct. 9 -- Ukrainian President Volodymyr Zelenskyy on Friday (local time) termed any easing of sanctions against Russia without a clear and lasting de-escalation agreement an "obvious weakness", warning that allowing Moscow to sell petroleum products could prolong the war.

His remarks come after US President Donald Trump had a conversation with Russian President Vladimir Putin.

In a post shared on X, Zelenskyy said peace could not be achieved through weakness and called for stronger sanctions against Russia, continued support for Ukraine and pressure on Moscow to end the war.

"Peace never comes through weakness. Today, representatives of the U.S. Congress were in Kyiv - a bipartisan delegation - and I am grateful to them for visit...