(the Brothers of al-Qassam) under the leadership of Farhan al-Sa'di, al-Qassam's spiritual heir, shot and killed two Jewish passengers on a bus and shot 3 Jewish drivers, killing 2, in the 1936 Anabta shooting, acts that became major contributing factors in the start of the 1936–1939 Arab revolt in Palestine. Peasant and urban guerrilla factions ("fasa'il") led by the Qassamiyun played a significant role in commencing the countrywide revolt. At the start of the revolt, al-Qassam's close disciples al-Sa'di, Abu Ibrahim al-Kabir, and Attiyah Ahmad Awad led "fasa'il" in the Jenin region, the Upper Galilee and Balad al-Sheikh, respectively.