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Turkey said its jets had intercepted a Russian fighter in its airspace and the prime minister threatened to shoot down any plane that strayed in future.

Two Turkish F-16s forced the plane back into Syrian airspace on Saturday and Ahmet Davutoglu called in the Russian ambassador to protest.

He said on TV: “The Turkish armed forces have their orders. The necessary will be done even if a bird violates Turkey’s border. Rules of engagement are clear.”

Russia said the plane had entered Turkey “by mistake” and assured Ankara it would not happen again.

But the US does not believe it was an error and officials are holding emergency talks.

The incident comes amid concerns over Russian air strikes in Syria against foreign-backed rebels.

Turkey also said that on Sunday an unidentified MIG-29 locked its radar on to two of its F-16 fighters.

Also on Monday, Turkey’s military said a MIG-29 jet had harassed two Turkish F-16s for five minutes and 40 seconds on Sunday by locking its radar on to them.