A cook uses a stone grinder for spices inside her home next to a school before serving free mid-day meal, distributed by a government-run primary school, for the children at Brahimpur village in Chapra district of the eastern Indian state of Bihar July 19, 2013. Police suspect that India's worst outbreak of mass food poisoning in years was caused by cooking oil that had been kept in a container previously used to store pesticide, the magistrate overseeing the investigation said on Friday.[Photo/Agencies]