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A family of four died in Istanbul, and while the cause was initially suspected to be food poisoning, it has since been linked to chemical pesticides

Investigators believe pesticides used in the hotel may have spread through ventilation, causing fatal chemical exposure

Eleven people, including hotel staff and a pesticide worker, have been arrested as the investigation continues

Authorities are investigating whether chemical poisoning killed a family of four in Turkey.

PEOPLE previously reported that Servet Böcek, 38, his wife Çiğdem, 27, and their two children Kadir, 6, and Masal, 3, died "on suspicion of food poisoning," while on vacation in Istanbul, the city's Regional Health Chief, Dr. Abdullah Emre Guner shared on X on Nov. 13.

However, it was then reported that

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