A portion of population,known as Brahui.
According to Josef Elfenbein (1989), the most common theory is that the Brahui were part of a Dravidian invasion of north-western India in 3rd millennium BC, but unlike other Dravidians who migrated to the south, they remained in Sarawan and Jahlawan since before 2000 BC.
Brahui is a Dravidian language spoken by close to 2 million mostly in the Pakistani province of Balochistan. Besides Pakistani, small groups of Brahui speakers are also found in Irani Balochistan, Afghanistan and in and around the Marw oasis in Turkmenistan.