Turkish police detained 34 military personnel in an ongoing investigation into the Fetullah Terrorist Organization (FETO), Ankara governorate announced on Wednesday.

FETO has been accused by the Turkish government of staging the defeated July 15 military coup attempt.

The Ankara Public Prosecutor’s office issued arrest warrants for the military personnel, including commissioned and non-commissioned officers, on charges of being members of a terrorist organization.

A prosecutor’s statement added that 26 of the detainees were Turkish gendarmes. Five other suspects were land force officers, two were marine officers and one was from the air force.

Those detained were held across 22 provinces.

FETO, led by U.S.-based Fetullah Gulen, is also accused of being behind a long-running campaign to overthrow the state through the infiltration of Turkish institutions, particularly the military, police and judiciary.

The July 15 defeated coup left 248 people martyred, and around 2,200 others wounded.

Since then, operations have been ongoing in the military, police and judiciary, as well as in the state institutions across the country, to arrest suspects with alleged links to the FETO network.