Turkish police have arrested 1,000 people supposedly part of the movement behind the failed coup of 2016.
A further 2,200 people are being sought by authorities in the wake of the raids. It is claimed they are part of a secret movement within the Turkish police forces.
Turkey has been carrying out an ongoing crackdown in the wake of the attempt to take over the state, which left more than 90 people dead last July.
President Erdogan's government claims the coup was organised by a US-based cleric, Fethullah Gulen.
The Turkish leader recently won a referendum to boost his powers, with critics saying he now has quasi-dictatorial control over the country.