Speaking shortly after Turkey detained more than 1,000 people in a new crackdown against alleged supporters of a cleric accused of orchestrating a coup bid previous year, Dundar added that the "whole country is under arrest".
Ties between European Union states and their North Atlantic Treaty Organisation ally Turkey soured in the aftermath of a failed coup last July as the bloc was taken aback by Mr Erdogan's sweeping security crackdown that followed. Some had earlier been assigned to oversee legal probes into suspected Gulenists, it said.
Turkey has suspended over 9,000 members of the country's police force as part of its post coup crackdown. Gulen denies any role in the coup attempt.
The latest detentions came ten days after voters narrowly backed plans to expand Erdogan's already wide powers in a referendum which opposition parties and European election observers said was marred by irregularities.
About 8,500 police officers participated in Wednesday's operation, Anadolu reported.
The suspects are allegedly Gulen operatives called "secret imams" who are accused of directing followers within the police force.
Suspected supporters of the US-based cleric Fethullah Gulen are escorted by plainclothes police officers as they arrive at the police headquarters in Kayseri, Turkey, April 25, 2017.
Last Sunday in Turkey a referendum approved by a narrow vote, after a campaign of intimidation, gives long-term President Recep Tayyip Erdogan the power to dismiss parliament and concentrate all power in his own hands.
The second wave of lustrations of the public sector has started in Turkey, beginning with the police.
After the Trump administration accused the Turks of failing to consult on their air activities, Turkey said Wednesday that it had consulted with all relevant US military and diplomatic agencies. Sebastian Fischer told reporters in Berlin that "we don't believe arresting 1,000 people so long af". The State Department has balked at Turkey's demand for his extradition, citing a lack of concrete evidence. Since late a year ago, pro-government media in Turkey have published allegations against global organizations, saying that some are involved in abusing refugees, including turning children against their parents and stealing body parts.