European Union leaders will phase out buying Russian oil, gas and coal as Moscow's war on Ukraine has made them realize they have to be less dependent on Russia, a draft declaration showed, but they are unlikely to offer Ukraine the fast EU membership it seeks.

Leaders of the 27-nation EU are to meet in Versailles, France, on Thursday and Friday, as Russia's war against Ukraine, which Moscow calls a "special military operation," enters its third week despite massive western sanctions.

"Russia's war of aggression constitutes a tectonic shift in European history," a draft declaration of the 27 EU leaders prepared for the summit said.