"NATO will not renounce our ability to protect and defend each other, including with the presence of troops in the eastern part of the Alliance," she said.
She added that the alliance remained "vigilant and continues to assess the need to reinforce the eastern part of our Alliance.
NATO will strengthen collective defense in response to deterioration of the security environment, she said.
"Russia's demands would create first and second class NATO members, which we cannot accept. We reject any idea of spheres of influence in Europe. We will always respond to any deterioration of our security environment, including through strengthening our collective defence," Lungescu said.
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