A probe report into the death of the 23 children after consuming mid-day meal at a government school in Bihar's Chhapra district, on Friday said there was mismanagement among all those people involved in implementing the scheme.
The report has been prepared by the Saran Police Commissioner and has alleged criminal negligence by the school principal.
It said the cooking oil used in the preparation of the meal was highly contaminated and that the rice was contaminated with large amounts of pesticide.
The report has been submitted to the Ministry of Human Resource.
A forensic report on the tragedy is expected either on Friday night or Saturday morning.
Meanwhile, headmistress of the Chhapra school, Meena Devi, who has been named in a First Information Report (FIR), is absconding, said police.
Bihar´s ruling Janata Dal-United (JD-U) party has alleged that the death of the children was a conspiracy against the Nitish Kumar government.