The incident led to the immediate closure of the Dhaka-bound lane, causing significant traffic congestion in the area, said Shafiqul Islam, Deputy Assistant Director of Munshiganj Fire Service.
The identity of the deceased could not be known immediately.
According to authorities, mobil oil from the truck spilled onto the bridge following the collision, blocking the flow of traffic.
Rescue operations are currently underway, with efforts focused on clearing the wreckage of the bus and truck using a wrecker, reports UNB.
Two units of fire service personnel are working in the rescue efforts, added the fire official.