Dhaka, Sept. 21 -- Three Russian military jets violated NATO member Estonia's airspace for 12 on Friday in an "unprecedentedly brazen" incursion, its government said, the latest in a series of recent military actions by Russia that have rattled the alliance.

Russia's Defence Ministry denied its jets violated Estonian airspace, saying they flew over neutral waters.

With tensions already high because of the war in Ukraine, the incursion came just over a week after more than 20 Russian drones entered Polish airspace on the night of 9-10 September.

That prompted NATO jets to down some of them and Western officials to say Russia was testing the alliance's readiness and resolve.

It also occurred three days after Russia and Belarus ended the...