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:
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 . Attack follows deadly suicide blast in Karachi Monday in which 40 died .