Russian President Vladimir Putin has bitterly condemned the downing of a Russian jet on the Turkey-Syria border.

He described it as a "stab in the back" committed by "accomplices of terrorists".

Turkey says its jets shot at the plane after warning that it was violating Turkish airspace. But Moscow says it never strayed from Syrian airspace.

Nato held an extraordinary meeting at member Turkey's request to discuss the incident.

Its Secretary-General, Jens Stoltenberg, has said allied assessment of the incident shows that the Russia warplane did fly into Turkish airspace.

One of the two crew members who ejected from the downed plane was killed by fire from the ground, the Russian military said. The fate of the other is unclear.

A Russian soldier was killed when the helicopter he was on came under fire during a search and rescue mission, a spokesman added.

Mr Putin warned there would be "serious consequences" for Moscow's relations with Turkey.

Russian Foreign Minister Sergei Lavrov has said he was cancelling his visit to Turkey, where he was due on Wednesday, over the incident.

He also advised Russians not to visit Turkey and said the threat of terrorism there was no less than in Egypt, where a bomb attack brought down a Russian passenger plane last month.

Downing of Russian jet 'violated international law'24 November 2015 Last updated at 23:05 GMT

The Russian Armed Forces have described the shooting down of a Russian jet on the Turkey-Syria border as "a flagrant violation of international law".

Turkey says its jets shot at the plane after warning that it was violating Turkish airspace. But Moscow disputes this.

Lieutenant General Sergey Rudskoy said the Russian jet "did not cross the Turkish border".