Seven charity workers, six of whom were women, have been shot to death in northwest Pakistan on Tuesday. A male colleague was also killed when their vehicle was hit by gunfire near a center run by Pakistani charity Ujala in the Swabi district. The vehicle’s driver was also injured in the attack. The district police chief said, “Four men came on two motorbikes. They attacked their van. They opened fire to the right and left of the van and fled on their motorbikes.” No one has claimed responsibility for the killings. Last month, nine health workers were killed while participating in a national polio-vaccination drive.