The students fell sick after dinner last night and complained of stomach ache, vomiting and diarrhoea, they said.
District health officer H S Shivakumar in a statement today said the students were immediately taken to hospital and given necessary treatment.
He said the chief officer of the Moodbidri town municipal council had been directed to submit a report on the incident.
Meanwhile deputy commissioner A B Ibrahim has ordered local bodies to inspect water tanks of educational institutions.