The European Union is expected to announce extra economic sanctions against Moscow over the conflict in eastern Ukraine.
It's understood the measures will include restrictions on state-owned Russian defence and energy companies.
The crisis has been top of discussions at a NATO summit in Wales – where the Ukranian president Petro Poroshenko has met with global leaders.
US Senator John McCain says the international community should stand up to Russian President Vladimir Putin.
Meanwhile David Cameron has urged fellow NATO leaders to end the practice of paying ransoms to secure the release of hostages held by Islamic State.
The British Prime Minister pressed his case at Cardiff Castle in Wales that the payments were simply funding terrorism.
It follows the threat to murder a British aid worker and the beheading of two American journalists.
