(Adds details, KNB report)
ALMATY, Dec 25 (Reuters) - A military transport plane crashed in southern Kazakhstan on Tuesday, killing 22 people on board, the Interfax news agency quoted a Kazakh security source as saying.
Kazakh TV channel KTK said the plane had disappeared from radar screens at about 1900 local time (1300 GMT) as it was making a descent near the city of Shymkent, the capital of the South Kazakhstan Region.
Kazakhstan's KNB security service said the plane, bound for Shymkent from the capital Astana, belonged to its border troops. The commander of the country's border guards, Turganbek Stambekov, was among 27 people on board, it said on its site (www.knb.kz).
The KNB did not say how many people had been killed in the crash.
KTK TV quoted its sources as saying the Antonov An-72 plane had plunged to the ground from about 800 metres in bad weather.
It broadcast footage of an eyewitness saying he had heard a loud explosion and seen flames at the crash site. (Reporting by Dmitry Solovyov; Editing by Andrew Osborn)