Two car bombings by rebel groups in Syria have killed more than 50 people. Rebel groups reportedly collaborated with Jabhat al-Nusra, a jihadist organization, on a suicide car bombing of a government checkpoint near the village of Hama, which killed at least 50 soldiers. Syria’s official news agency said that the bombing was carried out by terrorists and killed two civilians. The Free Syrian Army claimed responsibility for another bomb that reportedly killed 5 people in Mazzeh 86, a Damascus neighborhood near the presidential compound. Meanwhile, government tanks and helicopters were blasting neighborhoods around Damascus. In the Yarmouk camp in southern Damascus, five people, including a woman and two children, were killed when a mortar shell hit a bus.