The apparent collapse of the latest summit and renewed Russian attacks show that Trump’s hopes for a negotiated solution to the war remain distant.

There are no plans for President Trump and Russia's Vladimir Putin to meet "in the immediate future," a White House official said on Tuesday.

President Trump said last week that he and Russian President Vladimir Putin would meet in Budapest, Hungary, though he did not say when.

President Vladimir Putin on Wednesday oversaw a test of Russia's nuclear forces on land, sea and air to test their readiness and command structure.

The summit would have occurred roughly three months after Trump’s last meeting with Putin, during which he failed to extract a ceasefire. The decision to cancel the gathering underscores ongoing questions about the state of negotiations over ending the war and the intractable nature of Russia’s demands.

The airstrikes came as US President Donald Trump says his plans for an imminent summit in Budapest with Russia's Vladimir Putin have been shelved.

Moscow has accused Poland of threatening to allow "terrorist acts" against Russian President Vladimir Putin's plane.