US threatens more Russia sanctions

The US has warned Russia to tone down its aggressive rhetoric on Ukraine, or face further sanctions. US Secretary of State John Kerry told his Russian counterpart over the phone that Moscow must call for pro-Russian gunmen to lay down their weapons. Kiev and the West say Moscow commands the gunmen - claims denied by Russia. The Ukrainian authorities have re-launched an anti-terror operation to take back several towns in the east overrun by pro-Russian militants. Acting President Olexander Turchynov said he had ordered the operation to restart after two men - including local politician Vladimir Rybak - were found dead after being "brutally tortured", according to BBC.