NATO considering' long term presence in E. Europe

"We are considering more longer-term adjustments to our posture, our presence in the eastern part of the alliance. No final decision has been made on that but there is a process now going on within NATO," he told reporters in Brussels.

NATO defense ministers are expected to discuss reinforcements at their next meeting on Feb. 16-17. Western governments have urged Moscow to withdraw troops from Ukraine's borders, especially if Russia wants to see fewer deployments in eastern NATO allied states.

NATO currently has troops rotating in and out of eastern Europe, a so-called persistent, but not permanent, presence.