About 100 police officers were injured, and 10 of them were heavily injured, the police said.
A Kyiv Post reporter at the scene estimated that there were over 1,000 protestors gathered at the Parliament building. Police sources said 3,500 officers were protecting the building.
About 30 protesters were detained during the clashes, Interior Minister Arsen Avakov said.
Avakov said that the demonstrator who threw the grenade at the police had also been detained. He is a member of Svoboda and a fighter of Svoboda’s Sich volunteer battalion, he added.
Avakov blamed Svoboda and its leader Oleh Tyahnibok for the clashes.