Two Russian TU-95 bombers accompanied by two Russian SU-35 fighter jets were intercepted by two US F-22 Raptor fighter jets on Thursday as the foreign aircraft flew just outside of American and Canadian airspace near Alaska.

This is the second time that US F-22s have intercepted Russian bombers near Alaska this month. Previously, on September 1, the bombers were not escorted by Russian fighter jets.

Currently, Russia is undergoing its largest military drill since before the fall of the Soviet Union. The US Defense Intelligence Agency has said that Moscow is in the middle of a “massive state armaments program” which aims to modernize military equipment by 2020.