Kent-based soldiers have helped seize a truck containing enough explosives to make 140 potentially lethal explosive devices.

Soldiers from the 1st Battalion the Princess of Wales's Royal Regiment (1PWRR), which has a base in Canterbury, helped mentor Afghan police, who made the life-saving discovery.

The truck find led to the destruction of more than 700kg of homemade explosives, after police found a secret compartment in the back of the vehicle.

The find happened near Gereshk on October 7 after the Afghan National Police stopped a suspicious vehicle at a checkpoint on Highway 1, a main route in the area.

Officers became suspicious after finding the back of the truck completely empty. It's then that they discovered the hidden compartment in the back.

They found the haul of home-made explosive along with two pistols, a number of propaganda magazines and other IED components.