Leaders of four European countries met with Ukrainian President Volodymyr Zelensky in Kyiv for a summit earlier Saturday, during which they urged an “immediate, full, and unconditional” 30-day ceasefire in the Ukraine war.

The leaders of France, Germany, the United Kingdom, and Poland gathered in Ukraine’s capital city for a meeting of the “coalition of the willing,” a 31-member coalition designed to strengthen Ukraine’s defense against Russia in its over three-year war. They, along with the other nations joining the meeting remotely, agreed on a 30-day ceasefire proposal that would begin on May 12, threatening Russia with more sanctions on its banking and energy sectors if it does not comply.