Patna: A 30-year-old couple died while their 11-year-old daughter was seriously injured in a road accident near Cheta Bigha village under Nemdarganj police station in Nawada district on Tuesday night when the family was returning from a family function.The deceased have been identified as Pankaj Kumar (35) and wife Sushma Devi (31), who were residents of Teli Tola under Nemdarganj police station area. Both of them along with their daughter Pari Kumari were returning from a relative’s birthday celebration in Cheta Bigha village.Nemdarganj police station in-charge Ranjit Kumar said, “They were on a bike. While returning from a function, an unknown vehicle hit their bike from behind, causing them to fall on the road. Pankaj and Sushma suffered serious head injuries, due to which they died on the spot. Pari was taken to Sadar Hospital, from where her family members took her to a private hospital.”The station in-charge said, “After hitting the bike, the vehicle fled from the spot. CCTV cameras installed nearby are being scanned to identify the vehicle. Further investigation is underway.”