Several firefighting units have been dispatched to the factory in the Bayezid Textile area
The accident at Bakhsiganj Upazila’s Batrajorh left three others injured, said Jamalpur’s Superintendent of Police Md Nizam Uddin.
The dead have been identified as Babul Hossain, 28, his wife Shilpi Begum, 23 and the couple’s 10-month-old son ‘Abdullah’.
The microbus was heading to Rajibpur Upazila, when it lost control and fell into a roadside pond.
The three died on spot, said the police official.
Three others injured in the accident have been sent to the hospital.
Police have detained the driver of the car, said SP Uddin.