WANA: Unknown miscreants blew up the building of a private girls school in the Mughal Khel area of South Waziristan Agency (SWA) in wee hours on Tuesday. Political administration sources said that miscreants first kidnapped the watchman of the school and later blew up the building with twin blasts. However, no casualty was reported as the school was closed at night. The miscreants later set the watchman free. The administration said that over 600 girls of the tribal agency were getting education in the school. No militant group has yet claimed responsibility for the blast.