The French President, Emmanuel Macron, has accused his Turkish counterpart, Recep Tayyip Erdogan of breaking a promise to stay out of the conflict in Libya.
Mr Macron said Turkish ships had recently taken Syrian mercenaries there.
He said this breached a commitment President Erdogan gave earlier this month, when Turkey, France, Russia, Egypt and other countries agreed not to meddle in Libya.
The Turks are allied with the country’s UN-backed government.
France is among those states seen as supporting the government’s rival, the rebel General, Khalifa Haftar.