Moscow Denies Bulgaria's Claims of Violating NATO Airspace by Russian Planes

On Sunday, Bulgarian Defense Minister Nikolay Nenchev said that Russian warplanes crossed into the so-called "Bulgarian zone of responsibility" with switched off transponders four times during the previous month. He demanded explanations from Moscow calling the alleged incidents "provocations of Bulgaria and its Air Force." He added that Sophia was "taking preventive measures."

See the full article at sputniknews.com