Police officials said the mishap occurred at Purniabigha village under Hilsa police station in the district.
Hilsa Station House Officer (SHO) Rajesh Ranjan said the deceased have been identified as Nitish Kumar (25), a resident of Salimpur village and Dipak Kumar (22), a native of Chotkibhgha village.
The dead bodies have been sent to Biharsharif Sadar Hospital for postmortem, while the injured have been admitted to Hilsa sub-division Hospital. One of the seriously injured has been referred to the Patna Medical College and Hospital (PMCH).