Ukraine's president demands investigation of judge's killing

Ukraine's President Viktor Yanukovich smiles as he attends a news conference in Kiev December 21, 2011. REUTERS/Gleb Garanich

KIEV (Reuters) - Ukrainian President Viktor Yanukovich is urging authorities to investigate the murder of a judge who placed two anti-government protesters under house arrest.

With Ukraine's wave of unrest continuing, the murder of Oleksander Lobodenko raised concern that violence would escalate in the stand-off between the authorities and thousands of protesters.