Turkish authorities arrested 34 people on Wednesday over their suspected links to the Fetullah Terrorist Organization (FETO), the group behind the 2016 defeated coup in Turkey, security sources said.

Istanbul Police Department's teams for anti-smuggling and organized crimes conducted simultaneous operations across seven Turkish provinces and arrested 19 suspects, said a source, who asked not to be named due to restrictions on speaking to the media.

The suspects are accused of using ByLock, the terror group’s encrypted smartphone messaging app, and being “covert imams” – the senior FETO members – plotting infiltration into the Turkish armed forces, it added.

Meanwhile, two people, including a former judge, suspected of links to FETO were nabbed in the northwestern Edirne province when they were trying to escape to Greece illegally, another source said.

In a separate operation in the southern Antalya province, police arrested nine suspects, with one of them remanded in custody, and four of them sent to the provinces where the investigations continue on their name. The other four suspects were released.

Also, in a southern Kahramanmaras-based operation to uncover the activities of the terror group, gendarmerie teams arrested four suspects.

FETO and its US-based leader Fetullah Gulen orchestrated the defeated coup of July 15, 2016, in which 251 people were martyred and nearly 2,200 injured.

Turkey accuses FETO of being behind a long-running campaign to overthrow the state through the infiltration of Turkish institutions, particularly the military, police, and judiciary.

*Writing by Havva Kara Aydin