The European Union would be able to cope with a partial disruption to gas imports from Russia, European Commission President Ursula von der Leyen has said.

Escalating tensions with Russia over Ukraine have raised concerns about Russian gas flows to Europe, prompting the EU to review its contingency plans for supply shocks and EU and U.S. officials to seek alternative supplies.

"Our models now show that for partial disruption or further decrease of gas deliveries by Gazprom, we are now rather on the safe side," von der Leyen told reporters in Strasbourg on Tuesday.