Firearms and non-firearms, believed to be illegally possessed, were found at several suspects' homes during searches conducted as part of the investigation.
"Suspicions of illegal possession of firearms and ammunition, and non-firearms have been brought against them," the Prosecutor General's Office said in a press release.
Most of the 85 suspects have been subjected to measures of restraint, such as a written undertaking not to leave, submission of documents, and regular reporting to the police.
One person has been placed under the house until next March and another suspect will be under intensive supervision until mid-January.
Twenty-six persons, including two MPs, have been recognized as victims in the investigation.
Some 5,000 people gathered outside the parliament building on August 10 to protest against the government's plans to impose restrictions for those who refuse to get vaccinated or tested for COVID-19.
The rally turned violent in the evening, with some protested blocking exits from the parliament and throwing bottles and flares at police officers. The police used teargas against protesters.