Area was hub for militants until military flushed them out two months ago . Militants made threats to the community , member of local peace committee says . Khan said eight houses in the neighborhood collapsed , and the blast was so powerful it could be felt from 11 miles ( 18 kilometers ) away . Earlier , suspected U.S. drone attack killed four people , a Pakistani intelligence official said . Comment:
Area was hub for militants until military flushed them out two months ago . Militants made threats to the community , member of local peace committee says . Earlier , suspected U.S. drone attack killed four people , a Pakistani intelligence official said . Comment: