A bomb exploded near the building of a non-government organisation offering treatment to the blind in northwest Peshawar city on Saturday, injuring one person, police said. The bomb was planted behind the two-storey building housing the German-funded Comprehensive Health and Education Foundation in the city's University Town neighbourhood, senior police officer Imran Kishwar said. "It damaged the outer wall and one office employee was wounded. His condition is stable," Kishwar told media. The group's head, Daud Khan, said the early morning blast damaged some office equipment. "We are engaged in providing treatment to the blind people in North West Frontier Province. Our teams visit different parts of the province and offer treatment to local people suffering from eye diseases," he told AFP. "We receive funds from Germany." Peshawar has been in the grip of a wave of militant violence for the past several weeks and has been rocked by eight bombings in 12 days.