The Musa Khel, or Moosa Khel, is a Pashtun tribe of Gharghasht origin. According to Horace Arthur Rose they are part of the greater Kakar tribe. The tribe originates from Ghazni province in Afghanistan and resides in the tribal range of Musakhel and Batagram District in the Khyber-Pakhtunkhwa province of Pakistan and Afghanistan. Moosa Khel has the lowest literacy rate in Pakistan—10.37%—and is also a sub-tribe to Babozai, which is part of the major Pashtun tribe.
References
Musakhel (Pashtun tribe) Wikipedia(Text) CC BY-SA