iraqi officials said izzat ibrahim al-douri died in fighting with government troops in salahuddin province , north of baghdad .
al-douri , 72 , headed the naqshbandi order insurgent group , an important faction behind the recent rise of isis .
al-douri was the king of clubs in the famous pack of cards the us issued of wanted members saddam 's regime after its collapse .
he was one of saddam 's most trusted henchmen , helping to lead his 1968 bloodless coup .