At least 17 people were killed and more than 40 others wounded Monday after a car bomb exploded in a market in Pakistan's northwest tribal region, The Associated Press reported. No group has immediately claimed responsibility for the bombing. Abdul Qudoos, a doctor at a local hospital, said that five boys and two women were among the 17 dead. According to a local government official, the bomb exploded next to the women's waiting area of a bus stop, located near the office of a high-ranking political official in the Khyber tribal area. It was unclear whether the office was the intended target of the bomb. Also on Monday, gunmen in southwest Pakistan killed a provincial government spokesman in an apparent sectarian attack, police said. As the gunmen sped away, they shot dead two police officers and injured a third. Monday's attacks come days after ten Taliban militants targeted the military side of an international airport in Peshawar with rockets and car bombs. The attack killed four people and injured more than 40 others.