"We have detained the accused doctor after the victim's relatives protested against his negligence and beaten him," a district police official said.
Victim's father Prakash Pundit, resident of Dagarua in Purnea, about 350 km from Patna, said that he took his one-year daughter to a doctor in a nearby village following stomach pain.
"The doctor told us that she should be operated soon for appendicitis. He operated her by a knife used for cutting vegetables. During operation, he cut her intestine and her condition deteriorated following excessive bleeding," the father said.
The doctor then told us to take her to a private clinic. But the clinic refused to admit her and referred her to a sadar hospital.
"When we reached the hospital, doctors declared her dead," he said.
Police officials said they have begun investigation of the case.