Belarusian journalist and opposition activist Raman Pratasevich was taken into custody at an airport in Minsk after his Lithuania-bound flight was forced to land in Minsk on Sunday, dw.com reports.

Opposition figures swiftly criticized the move, which they said was a bid by the government of longtime leader Alexander Lukashenko to clamp down on critical voices.

Lithuania has demanded that NATO and the European Union act to resolve the situation, calling it a "threat to international civil aviation."

The plane was allowed to leave for Vilnius at 8:50 p.m. (1750 UTC) after being grounded for several hours with some 171 people on board. It landed about 30 minutes later in the Lithuanian capital.

Belarusian state news agency Belta reported that the plane had been rerouted to Minsk International Airport for an emergency landing due to a bomb scare.

Belarusian officials said Lukashenko had personally ordered a MIG-29 fighter jet to accompany the passenger plane.

Meanwhile, Pavel Latushka, a member of Belarus opposition Coordination Council, claimed that Belarusian air traffic controllers threatened to shoot down the passenger plane if it did not make an emergency landing in Minsk.

The former Belarus culture minister and diplomat based this claim on "information" that the council had received, but he did not provide further details.

An airport spokesperson told Belta that authorities did not find any explosive devices on the plane.

Opposition Telegram channel Nexta also reported that the plane was searched. The outlet said former editor Pratasevich had been detained.

"The plane was checked, no bomb was found and all passengers were sent for another security search," said Nexta. "Among them was... Nexta journalist Raman Pratasevich. He was detained."

The Belarusian Interior Ministry confirmed that Pratasevich was arrested at the airport. At least four people did not reboard the plan, including Pratasevich's girlfriend.

The arrest on Sunday was the boldest in a series of moves by Lukashenko's government to crack down on opposition figures and members of the press.

On May 15, a journalist who was on assignment for DW in Belarus was sentenced to 20 days in detention. He'd been arrested while covering a trial of an opposition figure.
Earlier this month, authorities in Belarus carried out a raid on independent media outlet Tut.by, searching their offices.

The campaign targeting opposition and independent media follows mass protests against Lukashenko. The longtime leader was re-elected for a sixth term in a disputed election in August 2020.

More than 34.000 people have been arrested in Belarus since August, with thousands of protesters beaten by security forces.