Hundreds of people in Poland and Lithuania gathered for protests on Saturday to show support for the opposition in neighbouring Belarus.
They called for the release of a Belarusian dissident who was arrested along with his girlfriend when their flight was diverted to Minsk.
The pair’s detention sparked global outrage, and prompted the EU to urge airlines to avoid Belarusian airspace.
Protests took place elsewhere in Europe as well as in the US and Australia.
Roman Protasevich, 26, and Sofia Sapega, 23, were flying from Greece to Lithuania on Sunday when a fighter jet was scrambled over Belarus to escort their plane to Minsk airport over a bomb threat which turned out to be fake.
They were arrested as soon as the Ryanair plane landed.
- Belarus plane: What we know and what we don’t
- Belarus plane arrest – is it a first?
- What happens with a military jet interception?
“I’m calling on all EU countries and the US to please help us free Roman and Sofia, as well as everyone else imprisoned,” Mr Protasevich’s mother, Natalia, said at a rally in the Polish capital Warsaw.
“We want to live in a free country, in a country where everyone has the right to express his beliefs,” his father, Dmitry, added.