File:Roman Protasevich at Minsk airport.jpeg

Summary

 * Source
 * Franak Viačorka @franakviacorka on Twitter, May 23, 2021 (12:35 GMT)
 * ''BREAKING! The regime landed @Ryanair plane, which was flying from Athens to Vilnius, in order to arrest the famous Belarusian journalist Roman Protasevich. In Belarus, he faces the death penalty. Belarus has seized a plane, put passengers in danger, in order to repress an opponent

The photo was taken by an unknown person at about 12:28 GMT, only 7 minutes before it was tweeted Franak Viačorka at 12:35 GMT. Note, that the sky walkway is seen in the background. It is a mirror image of what is seen on the ONT video at 21 minutes.
 * Timeline
 * 12:02: Protasevich enters airport bus
 * 12:22: Airport buses leave tarmac for terminal
 * 12:29: Airport buses arrive at terminal. Doors are opened and passengers enter terminal building.

It seems that this is the incident that was described by Protasevich that was thought to have happened Athens. See this video at 30 min 9 seconds, where Protasevich seems to be describing the incident.
 * Protasevich case: In the hands of the EYP the material from the security cameras of the airport - Indicator.gr, May 26, 2021