(The New York Times) – Hundreds of Syrian men who escaped rebel-held areas of eastern Aleppo to reach government-controlled parts of the city are missing, United Nations officials said on Friday, adding that they had received reports of government reprisals, including numerous arrests and several cases of summary killings of suspected supporters of the opposition. At the same time, the officials said, some rebel groups have prevented civilians from leaving and even killed or kidnapped those who demanded that insurgents leave their neighborhoods.