An Ankara court has accepted the chief prosecutor's indictment accusing seven people of belonging to a group that is attempting to overthrow the Turkish government.

The suspects, four of them police officers, are charged with being members of the Gulen movement, on which the indictment -- accepted on Thursday -- brings terrorism charges.

The suspects are charged with working to prevent the organization from being uprooted from state institutions.

The chief prosecutor said there is "concrete evidence" to the existence and motivations of a "Gülenist terror organization."

The Gülen Movement is a transnational movement led by the U.S.-based imam Fethullah Gülen. It is accused of wiretapping thousands of people including government officials and encrypted phones.

It has been accused of infiltrating state institutions in Turkey and trying to overthrow the government. Government officials have continuously expressed their determination to continue to lawfully fight the Gülen Movement, whose followers are accused of infiltrating state institutions to gain control of state mechanisms and illegal wiretapping, forgery of official documents and spying.