Turkish police issued 187 arrest warrants and raided some 200 homes and workplaces on Thursday as their investigation into last month’s failed military coup shifted towards the business community, media reported.

The assets of 187 businessmen were confiscated, Anadolu Agency said. The annual income of four largest companies raided on Thursday operation is said to be around TL 8.6 billion or $2.96 billion.

President Tayyip Erdogan has vowed to choke off businesses linked to the US-based Muslim cleric Fethullah Gulen, whom he blames for the coup attempt, describing his schools, firms and charities as ‘nests of terrorism’.

Aydınlı Group, Eroğlu Holding, Güllüoğlu Baklavaları and some members of the Turkish Confederation of Businessmen and Industrialists (TUSKON) were among the companies that were targeted. Istanbul mayor Kadir Topbaş’s groom Ömer Faruk Kavurmacı was also detained.

Police from a financial crimes unit launched dawn raids in Istanbul and 17 other provinces to root out supporters of Gulen’s movement, the privately run Dogan news agency reported.

An undisclosed number of people were detained at their homes and offices, the state-run Anadolu Agency said.

Gulen, formerly close to Erdogan but now living in self-imposed exile in Pennsylvania, has denounced the coup attempt, and denied any responsibility for it.

Dogan said prominent businessmen were among the suspects being sought by police on suspicion of belonging to and financing a terrorist organization. Turkey classified Gulen’s movement as a terrorist network in July 2015.

Earlier this week, police searched the offices of a nationwide retail chain and a healthcare and technology company.

Prime Minister Binali Yildirim said on Wednesday that 40,029 people had been detained since the coup attempt, and about half had been formally arrested pending charges.

He also said 4,262 companies and institutions with links to Gulen had been shut, and that 79,900 people had been removed from public duty in purges of the military, police, civil service and judiciary.

The European Union and the United States have expressed concern about the scale of the crackdown, and human rights groups have said a lack of due process will ensnare innocent people who had no role in the abortive coup.

Turkish officials say they have to act fast to prevent further attempts to destabilise the government from within the bureaucracy and the business community.

A faction of the military attempted to seize power on July 15, killing some 240 people, mostly civilians, and wounding 2,000. About 100 people backing the coup were also killed, according to official estimates.

The article originally appeared in Daily Mail on August 18.