Group of Seven leaders vowed at a summit in the Bavarian Alps on Sunday to keep sanctions against Russia in place until President Vladimir Putin and Moscow-backed separatists fully implement the terms of a peace deal for Ukraine.

The Ukraine conflict and a long-running debt standoff between Greece and its European partners dominated the first day of the annual meeting hosted by Chancellor Angela Merkel at Schloss Elmau, a luxury Alpine hotel in southern Germany.

Merkel is hoping to secure commitments from her G-7 guests to tackle global warming ahead of a major United Nations climate summit in Paris in December.