The incident occurred in the early hours of Tuesday near Sarlambe village in Shahpur tehsil while girder launching work was underway for a bridge.
As per the information, the machine was being used for the under-construction bridge of Phase III, the 701 km long Expressway.
Two NDRF teams are carrying out the rescue operation. 'Till now, 16 bodies have been retrieved and three have been injured,' a state government official said.
Awaiting further details. (UNI)