NEW : The opposition said at least 175 people had been killed across Syria on Friday . But Rupert Colville , a spokesman for the office of the U.N. high commissioner for human rights , said the United Nations has not been giving out overall death toll numbers since December ` The U.S. calls the potential use of chemical weapons ` ` completely unacceptable '' Iraq opens border crossings to Syrian refugees . Arab League offers Syria 's president ` ` a safe exit '' if he quickly resigns , leaves Syria .
NEW : The opposition said at least 175 people had been killed across Syria on Friday . The U.S. calls the potential use of chemical weapons ` ` completely unacceptable '' Iraq opens border crossings to Syrian refugees . Arab League offers Syria 's president ` ` a safe exit '' if he quickly resigns , leaves Syria .