"Attacks on Iran, and missile and kamikaze drone attacks (by Iran) on neighbouring countries in the Gulf have fuelled instability," he said in a televised address.

"Through peace-oriented diplomacy, we are making intense efforts to resolve issues at the negotiating table," he added.

Earlier, Foreign Minister Hakan Fidan met Washington's Syria envoy Tom Barrack, ministry sources said.

He also spoke with his UK counterpart Yvette Cooper to discuss "the current security environment in the region", evaluating "in detail" the "diplomatic efforts that could be undertaken to end the hostilities and establish stability".

He also discussed regional developments with Qatar's Prime Minister Sheikh Mohammed bin Abdulrahman Al Thani, with his Greek counterpart Giorgos Gerapetritis and with Nechirvan Barzani, president of Iraq's autonomous Kurdistan region.