Four trains are currently stranded at both ends of the Bangabandhu Bridge
Six people suffered injuries in the accident on the Dhaka-Chittagong highway around 1:30am Monday, said Md Abul Kalam Azad, a Daudkandi highway police officer.
A Chittagong-bound Saudia Paribahan bus went out of control and rammed into a tree killing four people on the spot: Shahabuddin, 35, Abu Hanif, 6, Nurul Hasan Rifat, 29, and Amzad Hossain, 28.
Police rushed the injured passengers to hospital.