Turkey warns Moscow over trade ties, says Russian military build-up in Syria 'unacceptable'

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Turkish President Recep Tayyip Erdogan is warning Russia that its military action in Syria is endangering trade ties with Turkey.

Erdogan says Ankara could look elsewhere for gas supplies and cancel the construction of its first nuclear power plant, which is being built by Russia. Russia supplies 60 percent of Turkey's gas needs.

The comments published in Hurriyet newspaper Thursday come amid tensions with Russia over airstrikes which Turkey and allies say have mainly targeted moderate Syrian opposition groups and over the Russian plane's violation of Turkey's air space.

Erdogan accused Russia of attempting to increase its military presence and create a base in Syria and described the situation as "unacceptable."

Moscow is backing President Bashar Assad while Turkey insists on his ouster.