The police have opened criminal proceedings over the seizure of the building of Donetsk Regional State Administration on April 6, the press service of the Donetsk regional office of the Ukrainian Interior Ministry has reported, according to Ukrinform.

"The information about the offenses has been included in the unified register of pretrial investigations under Part 1, Article 294 of the Criminal Code of Ukraine (mass riots). The investigation is underway. The action of protesters will be given a legal assessment," reads the statement.

As reported, pro-Russian forces staged a rally on Lenin Square in Donetsk on April 6. Then some protesters blocked traffic on Artema Street and moved to the regional administration building. The activists then scuffled with police and stormed the building.