At least two people have been killed and a further 27 injured following a Russian air strike on a shopping centre and market in the town of Dobropillia in Ukraine's eastern Donetsk region, officials have said.

Donald Trump asked Volodymyr Zelenskiy whether Ukraine could strike Moscow, an inquiry that the White House says was merely a question but one that came hours after he voiced frustration at Russian President Vladimir Putin’s refusal to accept a ceasefire in the war.

Russia has launched overnight attacks on four Ukrainian cities, injuring at least 15 people and targeting energy infrastructure.

President Trump's tone has shifted both towards Putin and regarding the continuation of U.S. military support for Ukraine.