The Gambila River (Pashto and Urdu: دریائے گمبیلا), also called the Tochi River (دریائے توچی), is located in Khost Province, Afghanistan, and North Waziristan and Bannu District, northwestern Pakistan.
The source of the river lies in the hills six miles south of the Spīn Ghar range, the source of the Kurram River, to which it runs parallel and finally joins. It borders North Waziristan while the Gomal River borders South Waziristan.
Bannu (Urdu: بنوں, romanized: bannū̃, pronounced [bənːũː] ), also called Bani Gul or Bani (Pashto: باني, romanized: bānī, pronounced [ˈbɑni] ) is a city located on the Kurram River in southern Khyber Pakhtunkhwa, Pakistan. It is the capital of Bannu Division. Bannu's residents are primarily members of the Banuchi tribe and speak Banuchi (Baniswola), a dialect of Pashto which is similar to the distinct Waziristani dialect. The residents regardless of their tribes are commonly called Banusi, Banuchi or Banisi.
The major industries of Bannu are cloth weaving, sugar mills and the manufacturing of cotton fabrics, machinery and equipment. It is famous for its weekly Jumma fair. The district forms a basin drained by the Kurram and Gambila (or Tochi) rivers.