Turkish police said they are seeking 144 people including police, soldiers and prosecutors, over suspected links to the network of US-based Fetullah Gülen, accused by Ankara in orchestrating last year's failed coup.
In raids across 42 provinces, 20 people have already been detained, the police said in a statement.
The suspects were thought to be using ByLock, an encrypted messaging app which was used by FETÖ terrorists, Yeni Safak reported.