FILE - In this Sunday, March 26, 2017 file photo, Belarus police detain journalist Raman Pratasevich, center, in Minsk, Belarus. Raman Pratasevich, a founder of a messaging app channel that has been a key information conduit for opponents of Belarus' authoritarian president, has been arrested after an airliner in which he was riding was diverted to Belarus because of a bomb threat. The presidential press service said President Alexander Lukashenko personally ordered that a MiG-29 fighter jet accompany the Ryanair plane — traveling from Athens, Greece, to Vilnius, Lithuania — to the Minsk airport. ??(AP Photo/Sergei Grits, File)

BRUSSELS — The European Union agreed Monday to impose sanctions against Belarus, including banning its airlines from using the airspace and airports of the 27-nation bloc, amid fury over the forced diversion of a passenger jet to arrest an opposition journalist.

In what EU leaders have called a brazen “hijacking” of the Ryanair jetliner flying from Greece to Lithuania on Sunday, they also demanded the immediate release of the journalist, Raman Pratasevich, a key foe of authoritarian Belarusian President Alexander Lukashenko.

A brief video clip of Pratasevich, who ran a popular messaging app that played a key role in helping organize massive protests against Lukashenko, was shown on Belarusian state television a day after he was removed from the Ryanair flight.

Sitting at a table with his hands folded in front of him and speaking rapidly, Pratasevich said he was in satisfactory health and said his treatment in custody was “maximally correct and according to law.” He added that he was giving evidence to investigators about organizing mass disturbances.

In their unusually swift action in Brussels, the EU leaders also urged all EU-based carriers to avoid flying over Belarus, decided to impose sanctions on officials linked to Sunday's flight diversion, and urged the International Civil Aviation Organization to start an investigation into what they see as an unprecedented move and what some said amounted to terrorism.

The leaders called on their council “to adopt the necessary measures to ban overflight of EU airspace by Belarusian airlines and prevent access to EU airports of flights operated by such airlines.” In addition to Pratasevich, they also urged authorities in Minsk to release his Russian girlfriend, Sofia Sapega, who was taken off the plane with him.

Ryanair said Belarusian flight controllers told the crew there was a bomb threat against the plane as it was crossing through Belarus airspace and ordered it to land. A Belarusian MiG-29 fighter jet was scrambled to escort the plane in a brazen show of force by Lukashenko, who has ruled the country with an iron fist for over a quarter-century.