An investigation has been launched by the Public Prosecutor of Ankara as part of the investigation into allegations of unlawful wiretapping resulting in the detention of 54 police officers.The investigation was launched simultaneously early on Wednesday in 20 cities, including Düzce, Konya, Hakkari, Van, Diyarbakır and Bolu, where a former intelligence department chief, a police commissioner and an officer were detained.Out of the 54 officers, 41 were taken into custody while police are still searching to locate some of the remaining officers.The suspects were brought to hospitals for a health checkup and were transferred to the security directorate for further inquiry.It has been reported that Muharrem Durmaz, the former deputy police chief of Ankara, was among those detained, while Zeki Güven, the former intelligence unit chief of the police and Hami Güney, the former deputy police chief of Ankara are still being sought.Suspects are allegedly members of the Gülen Movement, deemed a terrorist organization by the government, and are accused of wiretapping thousands of people, including senior government officials, allegedly to topple the democratically elected government. The Gülen Movement is a transnational movement accused of wiretapping government officials, encrypted phones and infiltrating state institutions with the aim of overthrowing the government. It has over private schools in over 160 countries, including the U.S., Europe, Asia and Africa, and has faced scrutiny in countries including Russia, Azerbaijan, Germany and the U.S.Arrest warrants were issued by the Istanbul Third Penal Court of Peace on Tuesday for Fethullah Gülen, the leader of the Gülen Movement, and Emre Uslu, a well-known figure from the movement, for "organizing and administering a terrorist organization, attempting to overthrow the democratically elected government of the Republic of Turkey, and exposing confidential data of the state for political or military espionage purposes."