Threatening letters from an unidentified source have asked video shops owners in Matta tehsil and other areas to pack up their business in 15 days, otherwise their shops will be blown up. Similar letters have been issued to vehicle owners carrying girls to educational institutions, asking them to install purdahs (curtain) on their vehicles; females have been asked to wear a veil and non-governmental organisations to stop working in the area. Swat District Police officer Mohammad Iqbal told Daily Times that police were investigating who sent these letters. Former federal minister and Awami National Party leader Mohammad Afzal Khan Lala said such letters are not new, as southern districts and other areas of the NWFP had received similar letters. He said the provincial government should use all its resources and secret agencies to track these elements. Meanwhile, police defused a bomb planted in Saidu Sharif courts. The DPO said the bomb disposal squad had defused a small remote-controlled bomb.