The food was served to students of Navtolia Middle School, Bisfi, about 22 km from here. The students alleged that the meal had a dead lizard in it.
Around 50 students complained of stomach ache and began vomitting after eating the midday meal. They were then rushed to Bisfi health centre, its medical officer in-charge A K Prabhat told reporters here.
"All the students are out of danger," he said.
District Magistrate Lokesh Kumar Singh and Circle Officer of Bisfi has reached the health centre to inquire into the matter.