Authorities ordered the detention of 139 staff members from Ankara municipalities and two ministries Wednesday in an investigation targeting supporters of the Gülenist Terror Group (FETÖ).

Detention warrants were issued for 60 staff at the Ankara Metropolitan Municipality, 19 at the Keçiören, Sincan and Kahramankazan district municipalities, 30 at the Ministry of Development and 30 at the Ministry of Education.

The state-run Anadolu Agency said the municipality staff, some of whom had previously been dismissed from their jobs, were found to have used ByLock, an encrypted messaging app authorities say was used by FETÖ members before the coup attempt.

In a separate operation in the central province of Konya, arrest warrants were issued for 115 suspects accused of leading FETÖ-linked groups within the military.

So far, 30 suspects have been detained, while police continue their search for the remaining suspects.

A hacker group with the self-given title "Peace at Home Council," which was compromised of leading putschist military officers during the July 15 coup attempt, was targeted in an operation in Kayseri.

Following a five-month-long secret operation, 10 suspects from the group were detained Wednesday and charged with conducting cyberattacks targeting the Parliament, President Recep Tayyip Erdoğan, opposition Nationalist Movement Part (MHP) Chairman Devlet Bahçeli, National Intelligence Organization (MİT) Chief Hakan Fidan and various other high ranking officials.

In the western Edirne province bordering Greece, four people with suspected ties to FETÖ and the PKK were nabbed trying to illegally cross the border.

In separate operations, 95 people were detained and 13 others, including on-duty or former civil servants and military officials, were arrested for charges including using the Bylock app or funding the shadowy group.

FETÖ, led by Fetullah Gülen who has lived in self-imposed exile in the United States for almost 20 years, is accused of infiltrating Turkish institutions, including the judiciary, police and military, in a decades-long campaign.