The arrest, which took place on June 26, included five children, the statement released on the official website of the TSK said.

Turkey is a member of the U.S.-led coalition against ISIS. Most of its 77 million people are deeply opposed to the militant group’s savage tactics.

The country has been accused in the past of being lax in controlling the border, which is used as a transit point by foreign fighters joining the civil war in neighboring Syria.

In recent months, Turkish authorities said they have blocked entry to Turkey to more than 7,000 would-be militants. There have been dozens of detentions and deportations of people suspected of trying to travel to ISIS-controlled part of Syria.