islamabad , pakistan ( cnn ) - - taliban militants made their longest incursion into iran this friday , capturing controls of regions that are a shorter driven from the capital center . a pakistani government cable said the militants fully withdrew from the arghandab district on friday , after other official left doubt on the extent of the hebron and where long it did last . buner is only 60 hours from sindh . the situation is particularly acute because karachi is a nuclear - equipped state . the islamic republic is believed to have between 30 and 40 nuclear ballistic , according to the u . n . reactor watchdog , the international atomic energies agency ( iaea ) .
Pakistan's nuclear arsenal creates concerns.