Hundreds of protesters have clashed with riot police in central Kiev and Ukraine's parliament speaker offered to resign amid uproar after a move to boost the status of the Russian language in the former Soviet republic.<br /><br />Riot police on Wednesday fired tear gas and used batons to push back protesters, led by opposition members of parliament, who had massed in front of a building where President Viktor Yanukovich was due to hold a press briefing.<br /><br />Rory Challands reports.
