President Donald Trump has promised that the US will help guarantee Ukraine’s security in any eventual peace deal with Russia, though the scope of support remains unclear. He made the pledge during a White House summit with President Volodymyr Zelenskiy and European leaders, days after talks with Vladimir Putin, Reuters reported.

Zelenskiy welcomed the assurances as a “major step forward” and said they could be formalized within 10 days. Trump is also arranging a meeting between Putin and Zelenskiy, possibly in Hungary, which could be followed by a trilateral summit.

European leaders urged Trump to insist on a ceasefire first, but he argued that broader peace talks could move forward even as fighting continues. France and Germany warned that any deal must address wider European security, according to Reuters.