Afghan police officers search the site of the crash, February 5. (AP Photo)
NATO helicopters have spotted the wreckage of an Afghan airliner that disappeared in the mountains east of Kabul. All 104 people on board appeared to have been killed, officials say.
The Kam Air Boeing 737-200 vanished from radar screens on Thursday while flying from the western city of Herat to the Afghan capital.
The aircraft had been turned away from Kabul's airport because of a severe blizzard. The pilot had contacted an airport in neighboring Pakistan for permission to land and was not heard from again.
Rugged terrain in Sorobi District and freezing fog and heavy snow slowed the search.
Airline officials say at least 21 foreigners were among the 96 passengers, including nine Turks and six Americans. Six Russian crew members and two Afghan staff were also on board.
On Friday, Canada's foreign affairs department said it's investigating whether any Canadians were on the flight. Unconfirmed reports said one of the pilots carried a Canadian passport.
Officials say NATO ground teams and about 200 Afghan national army troops were heading to the crash site, preparing for the job of picking through the wreckage.
The team includes a convoy of German armoured vehicles from the International Security Assistance Force (ISAF), the NATO-led peacekeeping force operating in Afghanistan.
ISAF says the wreckage is at an altitude of 3,000 metres (9,840 feet).
On Saturday NATO and Afghan troops located the wreckage of the   missing since Thursday.

Afghan interior ministry spokesman Latfullah Mashal announced the discovery. "The debris of the plane was found around 25 kilometers east of Kabul in a mountainous area called Band-e Ghazi."

The jet had been enroute to Kabul from  when it was diverted due to heavy snow. The crew then sought clearance to land across the border in ,  before it lost contact with air control. 104 persons are reported to have been aboard, including 8 crew members; there are no signs of survivors reported.

The weather conditions have hampered search and rescue efforts. NATO-operated helicopters located the crash site. Afghan police and units from Afghanistan's foreign peacekeeping force are investigating the scene of the crash, according to Mr. Mashal.