Russia's intervention in eastern Ukraine would be historic mistake – NATO Secretary General

If Russia were to intervene further in Ukraine, it would be a historic mistake, NATO Secretary General Anders Fogh Rasmussen said on Tuesday.

"It would have grave consequences for our relationship with Russia and it would further isolate Russia internationally," he said at the NATO Transformation Seminar in Paris.

The NATO secretary general once again urged Russia to pull back its troops from the border with Ukraine.