Turkish police have arrested 68 suspected supporters of the US-based Islamic preacher Fethullah Gulen during raids in 22 provinces, according to media reports on Tuesday.
The individuals - including ministry workers, former police chiefs and employees of state broadcaster TRT - were arrested as part of an ongoing investigation into donations, state news agency Anadolu said without giving further details.
Police are now searching for 120 suspects following the raids, Anadolu reported.
Turkish President Recep Tayyip Erdogan has accused Gulen, who has been living in exile in the US, of running a "parallel state" and of trying to overthrow the government.
The Islamic preacher was once Erdogan's ally, but the two had a falling out in recent years, sparking a rivalry and a purge of alleged Gulenists in state institutions.
Turkey has charged that Gulen's global movement, which runs schools and insists it is peaceful, is a terrorist group.
In March the state took control of the Gulen-linked paper Zaman, amid ongoing police operations against Gulen's network in Turkey.