Turkish police launched a probe yesterday into Koza İpek Holding, suspected of financially supporting and disseminating propaganda for a terror organization, authorities said. Police units from the Combating Organized Crimes branch of the Ankara Police Department raided the holding's 23 companies yesterday morning, police sources said.The holding is suspected of providing financial support and distributing propaganda of what government officials call the Gülenist Terror Organization (FETÖ), police sources said, which is led by U.S.-based Turkish imam Fethullah Gülen who lives in self-imposed exile in rural Pennsylvania. During the search, the police confiscated documents and computers belonging to the holding company. Six people have been arrested and an arrest warrant issued for Akın İpek, the group's chairman, who the source said was thought to be in the U.K.Koza İpek was founded in 1948 by Akın İpek's father, Ali İpek, as a printing company. Among its media holdings are the Bugün and Kanaltürk TV stations and daily newspapers Bugün and Millet. Additionally, Koza İpek Holding assembles more than 20 firms operating in a wide range of sectors, including the gold and media sectors.The raid on Koza İpek Holding's 23 companies did not include its media organizations, sources from the prosecutor's office told Anadolu Agency (AA). Newspapers owned by the group said the raids were conducted against the "İpek Media Group" but did not specify the offices of individual news outlets.In the investigation in which Akın İpek is accused of being the director of the Gülenist Terror Organization, it is claimed that $7.40 billion was illegally transferred to the holding's bank accounts located in Bahrain, Malta and Cyprus. However, $4 billion out of this sum could not be documented, according to the reports prepared by the Financial Crimes Investigation Board and Organized Crime Control Bureau. It is alleged that the non-documented balance is the money compiled for the Gülen Terror Organization.According to Turkish law no: 6415, as part of the United Nations Security Council's regulation regarding the prevention of financing terrorism, providing financial support to a terrorist organization is a crime; thus, operations can accordingly take place and assets frozen.In a statement published in the group's Bugün newspaper on Monday, İpek said his companies were being audited by the Finance Ministry's Financial Crimes Investigation Board. "There can be no basis for even a fictional crime scenario regarding our group," he said. Yesterday, he confirmed the raids on company offices and his home. "I do not even have any traffic offences," he added. He made no comment on his location.However, sources told Anadolu Agency that Ipek left Turkey two days before the investigation was launched against his companies. His private jet reportedly touched down at London Luton Airport late Sunday.The Gülen Terror Organization is accused of conspiring against the state, wiretapping thousands of people including government officials and encrypting phones. The organization has been labeled a threat against the country's national security. Government officials have continuously expressed their determination to continue to lawfully fight against the Gülen Terror Organization, which has been accused of trying to topple the democratically elected government through its operatives in the judiciary and the police. Moreover, the organization has been defined along the lines of "civilian elements attempting to take over the state by unlawfully organizing within state institutions" in the Red Book, a legal document that contains the country's security threats, since January 2015.The shares of 23 companies of the Koza İpek group plummeted after the police operation. The shares of Koza Altın, a gold company of the group, fell by 10.86 percent to TL 21.75 ($7.45) on the Borsa Istanbul (BIST), while shares of Koza Madencilik, a mining company of the Koza-İpek group, also fell by 10.26 percent to TL 2.10.