In May 2010 an errant US drone attack targeting al-Qaeda terrorists in Wadi Abida, Yemen, killed five people, among them Jaber al-Shabwani, deputy governor of Ma'rib Governorate who was mediating between the government and the militants. The killing so angered Shabwani's tribesmen that in the subsequent weeks they fought heavily with government security forces, twice attacking a major oil pipeline in Marib.[19]