Ukraine attacks 'must stop'

President Donald Trump urged Russia on Sunday to stop its attacks in Ukraine while his top diplomat said the US might walk away from peace efforts if it does not see progress.

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Speaking to reporters in New Jersey, Mr Trump said he was disappointed that Russia has continued to attack Ukraine, and said his one-on-one meeting with Ukrainian President Volodymyr Zelensky at the Vatican on Saturday had gone well.

“I see him as calmer. I think he understands the picture, and I think he wants to make a deal,” Mr Trump said of Mr Zelensky.

US Secretary of State Marco Rubio, meanwhile, said the Mr Trump administration might abandon its attempts to broker a deal if Russia and Ukraine do not make headway.

“It needs to happen soon,” Mr Rubio told NBC's Meet the Press. “We cannot continue to dedicate time and resources to this effort if it’s not going to come to fruition.”

Mr Trump and Mr Zelensky, in Rome for the funeral of Pope Francis, met in a Vatican basilica on Saturday to try to revive faltering efforts to end the war in Ukraine.