According to local media reports, the deadly reptile had bitten the boy after wrapping itself around the child's hand.
The woman was taken to the hospital after she showed symptoms of dengue.
The woman's heart stopped beating while her eggs were being collected.
The police have filed a case against the teenager under the Prevention of Child Abuse Act.
The accused allegedly committed the murders with the help of two of his friends.
During questioning, all the suspects confessed to the crime.
Eid Milad un Nabi or Eid-e-Milad marks the birth of the Islamic Prophet Muhammad.
The mother of the 2-year-old girl and 5-month-old boy was also injured in the incident.
Zimbabwe Parks and Wildlife Management Authority spokesman Tinashe Farawo called it an "unfortunate incident."
The bus was traveling along a perilous mountain highway in India when it careened over an edge.
Mahatma Gandhi is known across the world for pioneering the philosophy and strategy of non-violence.
The Carrington Police Department and the Foster County state's attorney in North Dakota launched an investigation into the death of the child.
The incident took place Wednesday in the western Indian state of Maharashtra, the police said.
Authorities said the child found the unsecured handgun in a bedroom.
The child's family said she was rushed to a hospital in the northern Indian state of Uttar Pradesh after popcorn got stuck in her throat Sunday.