Turkey has accused Russia of again violating its airspace and warned it would face consequences if such infringements continue. The foreign ministry said a Russian SU-34 jet flew into its airspace on the border with Syria on Friday.

It said the ministry had summoned the Russian ambassador in Ankara to strongly protest at and condemn the incident. Turkish President Recep Tayyip Erdogan warned yesterday that Russia would have to face consequences if it keeps up such violations.

Tensions between the two countries have been high since November, when Turkey shot down a Russian jet.

Russia has been carrying out air strikes in Syria since September. Moscow described the claim as baseless propaganda.