A Russian Sukhoi Su-27 fighter jet was deployed to intercept an unidentified aircraft moving towards the Russian border. The potential intruder turned out to be a Gulfstream jet collecting intelligence for the Swedish military.

The Swedish spy plane turned off its transponder while conducting a mission over the Baltic Sea, the Russian Defense Ministry reported on Thursday.

A video released by the Defense Ministry shows the Su-27 approaching the Gulfstream for identification, and shadowing it for some time until the Swedish jet changes course and leaves. The encounter happened in neutral airspace.

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