Pakistan's army says the ambassadors from the Philippines and Norway were killed in a helicopter crash in the country's north.

The army says the helicopter carrying 11 foreigners and six Pakistanis made a crash landing Friday, killing two pilots and four foreign passengers.

The army's spokesman, Maj. Gen. Asim Bajwa, tweeted that the MI-17 helicopter made the emergency landing in the northern area of Naltar.

It was unclear what caused the crash.