This frame grab from video provided by this militant video by Fatah al-Sham Front that is consistent with independent Associated Press reporting, shows black smoke rising from a suicide bomb attack on Syrian government forces positions in western Aleppo, Syria, Thursday. The Britain-based Syrian Observatory for Human Rights, which monitors the conflict through local contacts, reported that rebels attacked government positions with two explosives-laden vehicles. Syrian rebels launched a fresh wave of attacks on western districts of Aleppo Thursday as airstrikes on a rebel-held village south of the contested city killed civilians, activists said.