Turkey summoned the Russian ambassador to Ankara for a second time after a new violation of its air space by a Russian war plane close to the Syrian border, a Turkish foreign ministry official said on Tuesday.

"The Russian envoy was summoned for a second time yesterday (Monday) afternoon to strongly protest another violation of Turkish air space on Sunday," the official told AFP on condition of anonymity.

The violation on Sunday appears to have been the second in as many days after Turkey said its fighter jets intercepted a Russian warplane close to the Syrian border on Saturday.