The premier will also join the 80th UNESCAP session during the five-day visit
The accident occurred at the Upazila’s Jamaldi Bus Stand on Friday afternoon.
Police are yet to identify the victims.
Bhaberchar highway police outpost Sub-Inspector Saiful Islam said the Comilla-bound corn-laden truck lost control near Jamaldi around 1:30pm and struck the auto-rickshaw and the rickshaw.
Three people died on the spot, while the injured were rushed to hospital, said the SI.