Russia said on Wednesday that sending NATO troops into Ukraine would potentially be extremely dangerous, and Moscow was closely watching a Ukrainian petition that called for such an intervention. The petition, posted on the Ukrainian president's website, says Ukraine should ask the United States, Britain and other countries to send troops to help it repel Russia's invasion. "We have repeatedly said that direct intervention on the ground in this conflict by the military of NATO countries potentially carries enormous danger, so we consider this an extremely challenging provocation, nothing less, and, of course, we are watching this very carefully."