Donald Trump says he will be speaking to Russian President Vladimir Putin by phone on Monday about ending the war in Ukraine, saying the call would be about "stopping the 'bloodbath'", BBC reported.

In a post on Truth Social, the US president said the call would take place at 10:00 EDT (14:00 GMT) and he would then speak to Ukrainian President Volodymyr Zelensky, and the leaders of some Nato countries.

Russia and Ukraine were unable to reach any breakthrough when they held their first face-to-face talks in three years in Istanbul on Friday, although a prisoner swap was agreed.

Trump had offered to attend the talks in Turkey if Putin would also be there, but the Russian president declined to go, according to BBC.