"If neglected, I am certain that after a month they will reach Europe and, after another month, America," he said at a reception for foreign ambassadors Friday.
Official Saudi media carried the king's comments early Saturday.
"These terrorists do not know the name of humanity and you have witnessed them severing heads and giving them to children to walk with in the street," the king said, urging the ambassadors to relay his message directly to their heads of state.
Meanwhile Saturday, police in Iraq said a suicide bomber drove his explosives-laden car into an army checkpoint in the town of Youssifiyah, killing 11 people, including four soldiers, and wounding at least 24 people. Youssifiyah is 20 kilometers (12 miles) south of Baghdad.
Obama & UN needs to do something before it gets worse
This gives me WWII teas were they gave hitler most of the things he wanted to try to make him stop.