Turkish police have reportedly detained 20 people suspected of links to the Islamic State (IS) group in and around the Mediterranean city of Antalya.
Reports from Turkey say the detentions took place on October 30, ahead of a summit of the Group of 20 (G20) major economies near Antalya next week.
Two of those detained were said to be Russian citizens.
Turkish police have rounded up dozens of IS suspects in recent weeks in raids across the country, which has been a major conduit for militants crossing into neighboring Syria.
Describing the IS group as a "clear" threat, Turkish Foreign Minister Feridun Sinirlioglu said this week that Ankara was planning further military action against IS militants "in the coming days." He did not elaborate.
Turkey blames IS militants for last month's twin bombings in Ankara that killed more than 100 people.