"The three of them implemented needed procedures at the Aleksandrovka checkpoint at the border with Ukraine, after that they departed in the direction of Ukraine," Anton Bychkovsky said.
On Monday, Kolesnikova's family filed a missing person report with the police after her disappearance.
On Monday afternoon, the opposition coordination council published a video of the alleged detention of Kolesnikova, which took place in the morning. The video was filmed from car driving along Lenin Street — it shows how unknown persons put a person, presumably Kolesnikova, into a minibus. This happened at 10.02 (07:02 GMT) near the building of the National Art Museum of Belarus.