Two Afghan businessmen were wounded when a bomb planted in their car exploded in the northwestern tribal region of Pakistan on Saturday, an official said. The bomb went off shortly after the men, who are brothers, entered the car outside their home on the outskirts of Miran Shah, the main town in North Waziristan, said Ghulam Khan, a government official in the region. He said it was not clear who targeted the men, who were being treated at a hospital in Peshawar. Miran Shah is located near the Afghan border, where a number of Afghan refugees have been living since fleeing their homeland during a quarter century of war starting with the Soviet occupation in the 1980s. Many later settled in Pakistan.