Sources in the district administration said more than 250 people were invited to the house of one Mahesh Koda for Satyanarayan Katha on Monday evening. After consuming the prasad, most of the villagers complained of an upset stomach, dizziness and vomiting.
As the number grew, the district administration alerted the civil surgeon who sent a team comprising two doctors, six paramedical staff and three ambulances to attend to the patients at around 11pm.
Munger district magistrate Navin Kumar said most of those who took ill were fine after being given medication.
Dr NK Mehta, who treated the villagers said of the 170 people, 80 are still under treatment and everyone was out of danger.