Turkish prosecutors arrested four people on suspicion of negligent homicide after a German woman and her two children died in Istanbul , Justice Minister Yilmaz Tunc said Friday. Authorities have closed one of the food outlets in Istanbul's Besiktas district and taken samples from multiple locations where the family is believed to have eaten. The family — a couple and their children aged six and three — had traveled to the city on Sunday and reportedly ate at several street vendors in the