"You are a serious diplomat, and one of the most experienced diplomat[s] among us. You should not rely upon such frivolous claims," Cavusoglu told Lavrov during the meeting, as quoted by Turkish state-run Anadolu Agency. "I am ready to resign if you have any evidence that Turkey helps Daesh, but if you cannot prove your claims, I invite you to Antalya [Cavusoglu's hometown] as a guest for the rest of your life."
Ankara has been accused by both Moscow and Damascus of sponsoring the Daesh terrorist group, which is outlawed in many countries, including Russia. In December, Russia presented evidence of oil smuggling by the group across the border with Turkey, while the United States blamed Turkey for failing to secure its border with Daesh-controlled Syrian territories.
