A violent scuffle erupted in Ukraine's parliament over a bill that would allow the use of the Russian language in courts, hospitals and other institutions in the Russian-speaking regions of the country.
The fight broke out on Thursday evening between members of the pro-Western opposition who want to take Ukraine out of Russia's shadow and lawmakers from President Viktor Yanukovych's party, which bases its support in Ukraine's Russian-speaking east.
At least one legislator, opposition lawmaker Mykola Petruk, suffered an apparent blow to the head and was taken to hospital with blood streaming down his face.
The opposition demanded an investigation.
Ukraine is deeply divided into the Russian-speaking east and south, which favours close ties with Moscow, and the Ukrainian-speaking west, which wants Ukraine to join the Western club.