An anti-government protester throws a tyre into a fire at the site of clashes with riot police in Kiev.

An anti-government protester walks back after throwing a tyre into a fire at the site of clashes with riot police in Kiev.

An anti-government protester carries tyres at a barricade at the site of clashes with riot police in Kiev.

An anti-government protester carries a tyre at a barricade at the site of clashes with riot police in Kiev.