Two sisters, aged 12 and nine, were arrested in Jharkhand's West Singhbhum on Friday for allegedly murdering a six-year-old girl over a dispute on plucking mangoes. It's not clear if the deceased was plucking mangoes from the accused's family's orchard when the incident occurred, police said. They were booked on charges of strangulating the six-year-old girl, a police officer said.