The workers were constructing a toilet at a school next to the temple in Faridpur’s Madhukhali Upazila
The incident occurred in the Malek Bazar area along the Gopalganj-Pirojpur road around 11 am Saturday, according to Tungipara Police OC AFM Nasim.
The authorities have so far identified three of the victims as Sanjit Dhar, 40, Krishna Kirtaniya, 32, and Akamuddin Molla, 50.
The bus, operated by Dola Paribahan, was heading to Dhaka from Pirojpur. But the driver lost control of the vehicle as he tried to make way for a van before it veered out of control and fell into a ditch, said OC Nasim.
Police and fire service personnel later conducted a rescue operation with the help of locals.