The traders were returning to their neighbourhood after buying vegetables from the wholesale market in Manikganj’s Jaagir.
"The accident occurred when the car was trying to cross a railway crossing at Hoibotpur Union’s Manikdihi village around 11:30am on Thursday," Government Railway Police’s Sub-Inspector Idris Ali said.
He identified the victims as Rezaul Kabir Razu, 38, Joya Rani Das, 55, her grandson ‘Chayan’, 10, and the car’s driver ‘Hakim’, 32.
The two other injured were Joya’s daughter ‘Dipika’ and grandson ‘Badhon’.