Human rights activists are warning Syria has endured its deadliest violence to date in the three weeks since peace talks began between the Assad regime and the opposition. The Syrian Observatory for Human Rights says an average of 236 people have been killed every day since the U.N.-brokered negotiations opened in Geneva late last month. The toll includes a reported 50 people in Aleppo today. The Geneva talks face potential collapse with no movement between the two sides on the future role of President Bashar al-Assad.