The European Union must focus on a new sanctions package to suffocate Russia's economy and force President Vladimir Putin to end the war in Ukraine, France's foreign minister said.

"We are waiting for (Russian President Vladimir) Putin's agreement and we agree that if there is no real progress this week, we want to work together at European level for a significant tightening of sanctions," Merz said at a news conference with his Greek counterpart.

Latest measures come as European leaders threaten further action to force Vladimir Putin to the negotiating table.