Lavrov said Wednesday that the presence of troops from any NATO country in Ukraine "in any capacity, under any flag" would be considered a direct threat to Russia that would not be tolerated.

then the presence of the troops from NATO countries under any flag, in any capacity, on Ukrainian soil is the same threat,” the Russian minister said. NATO has not offered Ukraine membership ...

NATO Secretary-General Mark Rutte has warned Russia that the alliance would always stand by Poland or any other ally and that its reaction to an attack would be “devastating.” ...

Rubio is at a meeting of NATO foreign ministers at which many are hoping he will shed light on U.S. security plans in Europe.

March 17 (UPI) --Russian Deputy Foreign Minister ... that the presence of troops from any NATO country in Ukraine "in any capacity, under any flag" would be considered a direct threat to Russia ...