Turkey summoned the Russian ambassador after Moscow's war planes carried out a heavy bombing raid inside Syrian territory "very close" to the Turkish border, the foreign ministry said on Friday.

Russian ambassador Andrey Karlov was summoned to the ministry to hear Turkey's concern over Russia's bombing of "civilian Turkmen villages... very close to the border" with Turkey, the foreign ministry said in a statement. Turkey has asked Russia to "immediately end its operation," it added.