The Nobel Prize for Literature Svetlana Alexievich and Maxim Znak have been the final leaders of the Opposition Coordination Council nonetheless current in Belarus and nonetheless at massive. Several council members were arrested and others were forcibly expelled from the country.
Thousands of people have taken part in five weeks of protests following the August 9 election in which longtime President Alexander Lukashenko was declared the victor, but opposition parties, the United States and European Union allege was rigged.
Her disappearance follows the forcible removal of Sviatlana Tsikhanouskaya, the main opposition candidate who went missing the day after the August 9 presidential election only to surface in Lithuania.
Mr Znak, meanwhile, is believed to be the last active member of the Co-ordination Council inside the country.
The vote triggered mass protests amid allegations of vote-rigging.
Inside his vehicle, Kravtsov says he also found a coronavirus testkit, plane tickets, and a medical insurance policy for him and Rodnenkov to visit Turkey and the same documents for Kolesnikova to travel to Vienna and then to Munich. The initial wave of protests was accompanied by instances of excessive use of force by the Belarusian police, which used rubber bullets, stun grenades, and teargas against the protesters.
Kolesnikova had gone missing on Monday, with witnesses saying she was bundled into a minibus by unidentified masked men on the street in Minsk.
On Monday, Mr Znak had told the BBC he was concerned about his safety. And they have released a video supposedly "found on a mobile phone" in what they call "the place of the escape" in which Kravtsov explains that the three have chose to leave the country.
The police are yet to comment on reports of his detention. They are no opposition. Another top potential contender, Valery Tsepkalo, fled the country fearing arrest. "The regime must cease brutalising protesters, release political prisoners, and begin dialogue with the opposition".
So, for now at least, they seem unlikely to stop.
Others have been detained or forced to leave Belarus, in an intensifying crackdown by President Alexander Lukashenko's government over a disputed election. Her father said investigators called him Wednesday to say that she was moved to a jail in Minsk.
Tikhanovskaya called for her ally to be immediately freed. "This is terror against our own people", she said. "It's clear Lukashenko is afraid of negotiations and is trying.to paralyse the work of the Co-ordination Council and intimidate its members".
Official media outlets said earlier on Tuesday that Kolesnikova had been detained while trying to illegally leave Belarus.
No date has been set, but Lukashenko is preparing to travel to Moscow for talks with Russian President Vladimir Putin. The author and journalist also said she will remain in Belarus despite the campaign of pressure, the Russian state-run TASS news agency reported.