The Turkish government accuses US-based cleric Fetullah Gulen of running a terrorist group, FETO, to orchestrate the power grab. It has laid off, suspended or arrested thousands of people from all walks of life on claims they had ties with the organization.
FETO members allegedly communicated via an app called ByLock. The Daily Sabah newspaper said Turkish security services hacked the messenger last year, exposing a network of some 10,000 organization members.
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