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.