The children with complaints of head ache, stomach ache and vomitting were taken to Dr Ambedkar Medical College Hospital with anxious parents swarming the premises, making it tough for police to control them.
Speaking to reporters, Health Minister U T Khader, who visited the hospital, said "around 350 students have fallen ill and have been admitted to Ambedkar Hospital. Most of them have returned home after getting the treatment."
The children were brought to the hospital at around 3.30 pm with complaints of vomiting sensation, Anjaneya, Manager, Ananda Social and Educational Trust which runs the hospital, said.
A school teacher said she found a lizard in the food soon after which they stopped serving it.
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"All the 350 children who were brought for treatment have been discharged," D J Halli Police said late in the evening.
The Akshaya Patra Foundation, which supplies food to schools, in a statement said the food cooked by Akshaya Patra is into mass cooking and the same batch has been distributed to neighbouring schools as well. "No complaints have been registered. The food samples are sent to laboratory for the mandatory check-ups."