Three madrasa students were died and twenty others hospitalized after taking food in Narail on Wednesday midnight.The deceased are Emamul Haque, 18, son of Jabbar Hosen, of village Bargati, Alif, 8, son of Murad Miah, of village Pachuria and Ashraful, son of Afsar Sheikh.Ibrahim, a teacher of the Madrasa, said Emamul fell sick and was vomiting repeatedly on Wedensday midnight while all the students were sleeping after dinner. He succumbed on way to Narail Sadar Hospital.Alif and Ashraful were taken to Narail Sadar Hospital as they also fell sick. Later, Alif succumbed in the hospital while Ashraful died on way to Khulna hospital from there.Anik Saha, physician of emergency unit of the hospital, said the students might have died of food poisoning. Several of the sick were referred to Khulna Medical College and Hospital in critical state.