The European Union will join the G7 powers in imposing a 60-dollar-per-barrel price cap on Russian oil, the Polish ambassador to the bloc said Friday.

Poland, which was pushing for a lower ceiling, has withdrawn its objection to the European proposal and the measure will be made official this weekend, Andrzej Sados told reporters.

"We can formally agree to the decision," Sados said, explaining that Poland's fellow EU members had agreed to push forward with a new ninth round of sanctions against Russia.

The Czech presidency of the EU and diplomats from other member states said the deal had been confirmed and that the procedure to bring it into effect was underway.