delhi , pakistan ( cnn ) - - taliban militants made their deepest incursion into pakistan this week , seizing control of districts that are a narrow road from the capital city . a pakistan government official said the militant fully withdrew from the buner district on friday , whilst other officials casting doubt on the existence of the pullout and how long it would last . buner is only 60 miles outside punjab . the situation is particularly concerning because pakistan is a nuclear - armed state . the islamic rebellion is believed to have between 30 and 40 nuclear warheads , according to the u . n . nuclear watchdog , the national internal energy agency ( iaea ) .
Pakistan's nuclear arsenal creates concerns.