Three students, aged between 9 and 11 years, were apprehended for allegedly beating a five-year-old inmate to death in northeast Delhi's Dayalpur, police said on Saturday.
Earlier in the day, police had said that the boy died under mysterious circumstances as there were blisters on the his neck, abdomen, and groin area.
According to a police officer, after the autopsy it was found that the boy had multiple internal injuries as well. His liver was ruptured and there was bleeding in abdomen and right lung.
More investigation revealed that he was beaten by other inmates, who were apprehended, he said.
During interrogation, the accused gave conflicting reasons behind the incident.
According to one version, the victim had abused them and that led to a fight with him, while the other claimed they beat him thinking his death will lead to declaration of holiday from madrasa.
A CCTV footage has confirmed the findings and police are probing role of others, a police statement said.
According to police, they had received a call about the death of a boy at Brijpuri madrasa at 9.52 pm on Friday.
"At 6.30 pm on Friday, the boy's mother was informed that her son was sick. She took him to a private hospital in Brijpuri, where doctors declared him dead," a police officer said.