A 13-year-old boy died and six others of the same madrasah fell sick, after allegedly eating biscuits in Sharsha upazila of Jashore on Friday.
The deceased was identified as Mahin, a student of Ashraful Madaris Qawmi Madrasah in Narayanpur.
Of the injured, Mamunur Rashid, 10, was admitted to Jashore General Hospital in critical condition.
Hafez Maulana Anarul Islam, a teacher of the Madrasa said that the students were sleeping after having lunch. In the afternoon, they fell sick after eating biscuits brought by a student's guardian.
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Later, the injured were taken to the Upazila Health Center where doctors declared Mahin dead on arrival, said Mamun Khan, officer in charge (OC) of Sharsha Police Station.
The body has been sent to Jashore General Hospital morgue for an autopsy, said the OC, adding that the cause behind the death will be known after an investigation.