Ukraine's President Volodymyr Zelensky has accused Vladimir Putin of trying to "sabotage" diplomatic efforts to secure an immediate ceasefire. In a post on social media, he urged the US to put more pressure on the Russian president,

The Trump administration said it was optimistic about the possibility of a ceasefire in the Ukraine conflict even as President Vladimir Putin appeared to reject US calls for immediate halt to the violence.

Russia struck a sedate tone on Friday but acknowledged grounds for cautious optimism, after only backing the "idea" of a U.S. brokered 30-day ceasefire with firm caveats.