Khasas were a north western tribe mentioned in the epic Mahabharata. They were probably the modern-day Kazakhs found predominantly in Kazakhstan a Central Asian Republic. It is not clear if the Khasas mentioned in Mahabharata were a migrant group from Khasakhstan or original Khasakhs. They were mentioned as barbarous tribes and to have arrived from diverse realms.
References
Khasas (Mahabharata) Wikipedia(Text) CC BY-SA