An armoured vehicle came under attack from petrol bombs and was engulfed in flames on Tuesday evening. It was not clear what happened to those inside.
Violence was met with violence on the streets of Kyiv.
Police claimed that Tuesday’s operation against protesters was an anti-terror campaign against individuals who had clearly armed themselves.
The authorities said they were determined to uphold the rule of law :
“Organisers of mass protests will be held accountable, said Ukrainian Prosecutor General Viktor Pshonka. “We will demand the heaviest punishment both for those who revved people up to take part in today’s action and for those who organised and controlled them.”
The months-long stand off in Ukraine has involved a number of groups which espouse direct action.
More moderate protesters have distanced themselves from the extreme, but on Tuesday there were reports of riot police officers being held hostage and beaten up.