ISTANBUL - Turkish authorities have detained 11 people who staged demonstrations in protest of the G20 summit meeting near the Turkish Mediterranean coastal city of Antalya.

The state-run Anadolu Agency says police nabbed four protesters who held up placards outside a domestic flights terminal at Antalya airport on Saturday. The private Dogan news agency said the protesters were members of a left-wing group and held up banners that read: "Murderer U.S. get out of the Middle East."

Seven others demonstrators were detained in Istanbul after protesting G20 leaders outside the German and British consulates.

The terror attacks in Paris and the war in Syria are expected to loom large at the G20 gathering in Turkey.

The Islamic State group claimed responsibility for the deadliest attacks in France since World War II.