Two NATO drivers were killed when gunmen opened fire on supply trucks passing through northwest Pakistan near the Afghan border, local officials said.
The News quoted local official Asmatullah Wazir as saying, that the first driver was killed in the Jamrud area of Khyber by two motorcycle-borne gunmen.
In a separate attack, gunmen opened fire on another NATO supply truck in a suburb of Peshawar, killing its driver, senior police official Muhammad Faysal Murad said.
Murad said the truck was empty and had returned from Afghanistan after delivering supplies.
There was no immediate claim of responsibility for the killings.
Pakistan is a key transit route for the NATO mission in landlocked Afghanistan, from where it is driven to the border from the Arabian Sea port of Karachi.
Pakistan and the United States have signed a deal allowing NATO convoys to travel into Afghanistan until the end of 2015.