French President Emmanuel Macron has accused his Turkish counterpart Recep Tayyip Erdoğan on Wednesday of breaking promises made at the Berlin conference on Libya citing the arrival of Turkish warships and Syrian fighters in the war-torn country.

“I want to express my concerns with regard the behaviour of Turkey at the moment, which is in complete contradiction with what President Erdoğan committed to at the Berlin conference,” Reuters news agency quoted the French president as saying at a news conference with the Greek Prime Minister Kyriakos Mitsotakis.

“We have seen during these last days Turkish warships accompanied by Syrian mercenaries arrive on Libyan soil. This is an explicit and serious infringement of what was agreed in Berlin. It’s a broken promise,” Macron said.

Reports emerged earlier on Monday of two Turkish frigates being spotted off Libya as part of an effort by Ankara to boost military support for the U.N.-recognised Government of National Accord (GNA) in Tripoli, which has been fighting against an offensive by the eastern-based Libyan National Army (LNA) since April.

Turkey backs the GNA government of Fayez al-Sarraj in Libya, which has been split into rival political and military factions since the civil war of 2011.

Ankara has sent military personnel to support and train GNA forces and has said it could send troops to Libya at the request of the GNA.

Turkey has also been accused of deploying Syrian mercenaries to the war-torn country.