The Taliban claimed responsibility Monday for two explosions targeting a government building in Pakistan's tribal region, a Taliban leader said. The blasts killed 50 people and injured at least 70 others, according to Shamas Ul Islam, a senior government official in Mohmand Agency. Umar Khalid, head of the Pakistani Taliban in Mohmand Agency, said pamphlets had been distributed in the area 20 days ago warning members of peace committees or Lashkars (tribal militias) to abandon any efforts to join the government in fighting militants or face "consequences." "We will continue to attack all pro-government officials and their supporters who try to join any peace committees or Lashkars," Khalid said. The blasts occurred as government officials were about to meet with members of a volunteer...