According to the Turkish media outlet Haberturk, the Turkish prosecutor's office has detained 102 former employees of the Borsa İstanbul Group.
The operation is said to have included searches of 70 residences. Those detained have been taken to a police station in Istanbul for further investigation and questioning.
Purges in Turkey have been ongoing following the coup attempt in July 2016, with over 40,000 Turkish citizens arrested and about 145,000 people, among them civil servants, security personnel and academics, dismissed from their positions.