An-26 aircraft crashes while landing at Kazakhstan's Almaty airport, 4 dead

It was unclear how many people were on board or if there were any casualties.

An An-26 military aircraft flying from the Kazakh capital, Nur-Sultan, crashed while landing in Almaty on Saturday, killing four of six people on board, the Central Asian nation's emergencies ministry said.

An aircraft is seen at Almaty airport, Kazakhstan. (Representational )

Russia's Interfax news agency said citing a source that the plane belonged to Kazakhstan's border guard service, part of the National Security Committee.

"According to preliminary data, four people have been killed, two people have been hospitalised... with injuries," the emergencies ministry said in a statement.

Photographs from the site showed the plane turned over and on fire. Videos posted online also showed plumes of smoke rising from the crash site and visible from a nearby highway.