The contentious exchanges between Russian and NATO aircraft above Europe carried over into cyberspace early on Friday.

“6 interceptions of @NATO recon planes on our borders last week,” The Russian embassy in the UK tweeted Friday morning.

“Transparency, provided for by Open Skies Treaty, not enough?” the tweet concluded.

Russian aircraft and their NATO counterparts have had numerous encounters in recent months, especially in the skies over the Baltics, where both forces are highly active.

The Open Skies Treaty, which Russia and the US are party to, “is designed to enhance mutual understanding and confidence by giving all participants, regardless of size, a direct role in gathering information through aerial imaging on military forces and activities of concern to them,” according to the US State Department.

Moscow claims that 20 foreign aircraft, six of which were intercepted, flew close to the Russian border this last week, but would not provide additional details about the alleged incidents, according to Newsweek. But Russia also admitted that NATO planes didn’t stray from international airspace.

Read the whole story from Business Insider.

Featured image courtesy of Russian Ministry of Defense