İrfan Koç, the owner of Onko Koçsel pharmaceutical company was detained over coup charges along with two other executives, on Thursday.

According to the state-run Anadolu news agency, police took into custody the owner,  Onko’s general manager Tuğçe Koç and  the human resources director Ayda Onat.

Investigation was launched against three after the text of a warning sent by Onat to all employees during the July 15 coup attempt were published in the media.

“Dear Onko Koçsel family, we strongly recommend you not to get out of your homes for your safety and we wish the country be reach to peace as soon as possible. Sincerely,” read the statement.

After the coup failed, a company worker, who was later dismissed, filed a complaint against the company accusing it of being member of the Gülen movement, which the government put blame on for the coup attempt; of abetting an armed terrorist group and of taking part in attempts to topple down the government.

According to Turkish media, the company was suspected of being inspired from the Peace at Home Council, a controversial rogue group within the military that claimed to be an executive body of the coup attempt, as it used the word peace in its own statement.

Established in 1987, Istanbul-based Onko produces oncologic pharmaceutics at its factory in Kocaeli province. The company has also two overseas branches in Florida, US and Sofia, Bulgaria.