The incident is likely to destabilise the already fragile security situation in the country as international peacekeepers have already begun a phased withdrawal.
The move comes following the events at the Capitol, after which several on and off-duty police officers and active military personnel were arrested for participating in the siege.
It came a day after President Félix Tshisekedi announced the end of the governing coalition
While polling officials say the election is running smoothly, voters in some parts of the country have been threatened by Jihadists not to cast their vote.
Angry Peruvians have taken to the streets in daily demonstrations accusing Congress of staging a parliamentary coup putting Manuel Merino in power.
The video shows officers forcefully restricted Jozef Chovanec's movements in a cell at Charleroi airport, with one officer sitting on him for a long time. Another officer made an apparent Nazi salute during the incident.
Six police officers were injured and there were several arrests, as violence broke out at a demonstration against a new law to curb public protests.