The Pakistani Air Force (PAF) may receive additional F-16 Fighting Falcons as the country negotiates with the US to purchase the Lockheed Martin multirole fighter.

Pakistani air chief Marshall Rao Qamar Suleman said all purchases were still in the negotiating stage, and he has not disclosed the number of fighters that the PAF intends to buy.

The PAF currently operates a fleet of 63 F-16/S aircraft, which includes 45 A/Bs and 18 C/Ds.

Three A/Bs are undergoing a mid-life upgrade in order to become C/D aircraft at Turkish Aero Space Industries (TAI), while all the aircraft are planned be upgraded by 2013/14.

The PAF has sent four other F-16s to the US for technical verification to develop the upgrade kits for TAI, according to Pakistan Defence.