The announcement was made by leaders of Britain, France, Germany, Poland and Ukraine after a meeting in Kyiv, and a phone call with President Trump.

Leaders from four major European countries have threatened to ratchet up pressure on Russian President Vladimir Putin if he does not accept an unconditional 30-day ceasefire in Ukraine that they offered in a strong show of unity with Kyiv.

The leaders of Germany, France, the United Kingdom and Poland have arrived in Kyiv for key meetings with Ukraine’s President Volodymyr Zelensky, a symbol of a united European position to publicly pressure Russian President Vladimir Putin.