Two ambassadors to Pakistan were among six people killed when a military helicopter crashed into a school in the country’s mountainous north on Friday, the Guardian quoted the Pakistani army as saying Friday.

The two pilots of the MI-17 transport helicopter were also killed in the crash, which took place as the foreign dignitaries were being ferried to the inauguration of a project that was to be presided over by Nawaz Sharif, Pakistan’s prime minister.

Army spokesman Asim Bajwa said four foreign passengers died, including Domingo D Lucenario, the Philippine ambassador, and Norwegian envoy Leif H Larsen.

The wives of the Malaysian and Indonesian envoys were also killed, while the Polish and Dutch ambassadors were among the injured.