Istanbul —

Turkish police are investigating after a vacationing family of four died of suspected poisoning in Istanbul.

The Böcek family, who were visiting from Hamburg, Germany, fell ill on November 12 after a day touring one of Istanbul’s main tourist spots and eating street food, according to Turkish state-run news agency Anadolu.

Initially treated for what appeared to be food poisoning, the family was discharged from a hospital but returned later with worsening symptoms.

The two children, Kadir, 6, and Masal, 3, died Thursday, and their mother, Cigdem, 27, died a day later. The father, Servet, 38, remained in critical condition over the weekend and died on Monday, Anadolu reported.

Authorities initially considered food poisoning as the cause of death and swept up street food v

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