
The identities of the deceased and injured could not be confirmed immediately.
All of the victims were passengers of the CNG auto-rickshaw, said Muktagachha Police Station Officer-in-Charge Md Kamrul Hasan.
According to police and locals, the speeding sand-laden truck coming from the opposite rammed the autorickshaw around 12 pm, leaving thee female passengers dead on the spot and three others seriously injured.
The CNG-run autorickshaw was severely mangled while the truck overturned on the road.
The injured were rescued and taken to Mymensingh Medical College Hospital where another victim succumbed to injuries, reports UNB.
Police later reached the scene and recovered the bodies.
Such accidents are often caused by overspeeding and reckless overtaking, said the OC.