In Syria, dozens of people died Saturday after a fuel truck blew up in front of a courthouse in the northern rebel-held town of Azaz, near the border with Turkey. No group has claimed responsibility for the bombing. Elsewhere in Syria, airstrikes resumed Sunday against a rebel-held valley near Damascus, after negotiations between the Syrian government and anti-government rebels collapsed and Russian warplanes began launching airstrikes in northern Syria, at the behest of Turkey.