A woman and her three daughters consumed some poisonous substance in a bid to commit suicide in Khajahanpur village in Begusarai district, town police station in-charge Md Islam said.
The woman Parvati Devi (50) and her youngest daughter Arti Kumari (10) died during treatment at Sadar hospital, he said, adding two other girls Sangita Kumari (17) and Savita Kumar (14) were battling for life in the same hospital.
The woman took the extreme state due to frequent quarrel in the family, Islam said quoting family members.
The youth took the extreme step over a land dispute, the police officer said.