Pakistan will receive the first four of 18 upgraded F-16s from the US this week and the multi-role combat jets will give its air force the capability to conduct night operations and use precision-guided munitions.

The four Block 52 F-16s are due to arrive at Shahbaz airbase in Jacobabad on Saturday, official sources were quoted as saying by the Dawn newspaper.

The delivery of all 18 jets ordered by Pakistan from the US will be completed by the end of this year, the sources said.

The jets will enhance Pakistan Air Force's capabilities for the ongoing war against terror, the sources were quoted as saying.

Pakistan is also conducting negotiations with the US for purchasing another 14 new F-16s, the sources said. The Block 52 F-16s are more advanced than the F-16 A/B jets in the PAF's existing fleet.

The PAF is in the process of conducting a mid-life upgrade of its fleet of 30-year-old F-16s. Four of the 45 old F-16s are currently being upgraded and they will be ready in a couple of months, the sources said.

Ahead of the delivery of the Block 52 F-16s, eight Pakistani pilots underwent training in the US.

The training included a course to make the transition from the F-16 A/B to the F-16 Block C /D aircraft, flight lead upgrade training and instructor pilot certification so that they eight pilots could train others to fly the new jets.