Turkish police carried out dozens of raids on Thursday against businesses in 18 provinces, with detention orders for 187 businessmen, broadcaster CNN Turk reported, as the crackdown in the wake of last month's coup shifts to the private sector.
Prosecutors were also seeking to freeze the assets of all 187 people, in line with similar measures taken in the past weeks.
The government says the wave of arrests is targeting followers of Fethullah Gulen, the US-based Turkish preacher who the government blames for the July 15 coup attempt. Gulen denies the charges.
Among those sought in the latest sweeps were members of the family that run the Gulluoglu baklava stores, a famous chain selling Turkish sweets.
Turkish media reported that 60 people were brought into custody following the raids. The son-in-law of Istanbul mayor Kadir Topbas was among those detained.
Prime Minister Binali Yildirim told state-run broadcaster TRT that since the coup 20,355 people have been formally arrested, out of some 40,000 people detained.
Turkey has suspended or fired some 81,000 civil servants since the coup attempt and has begun to now focus on businesses allegedly linked to Gulen. On Tuesday there was also a wave of arrests, including raids on the offices of a supermarket chain.