Death marks the walls and the grounds in northwest Pakistan.<br/> <br />Officials say a suicide bomber killed at least four at a camp for internally displaced persons in Peshawar.<br/> <br />Registration at the camp was underway when officials say the bomber approached and shot gunfire at security.<br/> <br />He then blew himself up.<br/> <br />The 11 wounded were taken to a nearby hospital.<br/> <br />No one is claiming responsibility for the attack.<br/> <br />The city - located on the edge of Pakistan's tribal areas bordering Afghanistan - has seen frequent attacks by militants in the past few years.
