The EU is giving Russia an ultimatum - move out of Ukraine within on week or face further sanctions.
Ukrainian President Petro Poroshenko has said his country is "close to a point of no return" - that is a full scale-war with Russia.
Russia denies Western accusations that its forces have illegally crossed into Ukraine to support separatists there.
Events in Ukraine have overshadowed a special meeting of EU heads of state where Donald Dusk has been newly announced as president of the European council.
Speaking from Brussels the Taoiseach Enda Kenny said further sanctions are the right way forward.
