European Union leaders are considering a joint response to Belarus’ diversion of a Ryanair plane travelling between EU member nations in order to arrest a prominent opposition journalist.

Roman Protasevich, who ran a popular messaging app that played a key role in helping organise protests against Belarus’ authoritarian president Alexander Lukashenko, was on board the Ryanair flight from Greece to Lithuania when it was diverted to the Belarusian capital, Minsk, while flying over that country.

Belarusian flight controllers had warned the plane crew of an alleged bomb threat and ordered it to land in Minsk, and a Belarusian fighter jet was scrambled to escort the Ryanair airliner.

Raman Pratasevich
Raman Pratasevich (AP)

Shortly after the landing, the 26-year-old Protasevich and his Russian girlfriend were led out of the plane.

The jet was eventually allowed to continue its flight and landed in Vilnius hours behind schedule.

Lithuanian president Gitanas Nauseda called the incident a “state-sponsored terror act” and proposed banning Belarusian planes from European Union airports and “serious sanctions” against the Belarusian government.

The 27 EU leaders are opening a two-day summit on Monday, and the issue immediately shot to the top the agenda amid united condemnation of Mr Lukashenko.

EU foreign policy chief Josep Borrell called it “yet another blatant attempt by the Belarusian authorities to silence all opposition voices”.

He called the diversion of the plane an “inadmissible step”, highlighting a further worsening in relations between both sides.

Belarus protester
A woman holds a poster which reads: ‘I’m/we’re Roman Protasevich’ at the international airport in Vilnius (AP)

US secretary of state Antony Blinken called the incident “shocking” and accused the Belarusian government of endangering the lives of those aboard the aircraft, including some Americans.

He called for the release of Protasevich and for the Council of the International Civil Aviation Organisation (ICAO) to review the incident.

Flight tracker sites indicated the plane, which was flying from Athens to Vilnius, was about six miles from the Lithuanian border when it was diverted.

Passenger Marius Rutkauskas said after the plane finally arrived in Vilnius: “I saw this Belarusian guy with girlfriend sitting right behind us. He freaked out when the pilot said the plane is diverted to Minsk. He said there’s a death penalty awaiting him there.

“We sat for an hour after the landing. Then they started releasing passengers and took those two. We did not see them again.”

Route of diverted Ryanair flght from Athens to Vilnius
(PA Graphics)

Protasevich was a co-founder of the Telegram messaging app’s Nexta channel, which played a prominent role in helping organise protests against Mr Lukashenko.

The Belarusian authorities have designated it as extremist and levelled charges of inciting riots against Protasevich, who could face 15 years in prison if convicted.

Months of protests in Belarus were fuelled by Mr Lukashenko’s election to a sixth presidential term in an August vote which the opposition denounced as rigged.

More than 34,000 people have been arrested in Belarus since August, and thousands were brutally beaten.