There are approximately 4 million Kurds in Iran. They are the third most important ethnic group in the country after the Persians and Azarbaijanis and account for about 9 percent of the total population. They are concentrated in the Zagros Mountain area along the western frontiers with Turkey and Iraq and adjacent to the Kurdish populations of both those countries
http://countrystudies.us/iran/40.htm
A muslim from the U.N. says that Iran has no weapons capability, and we are supposed to believe him?
They mostly live in west of Iran however there are some kurds in NE of Iran but not in north by the caspian sea.