Four construction workers were killed and 15 others injured as a pickup van overturned at Chowmuhani Bazar in Noakhali's Begumganj on Sunday.
The identities of the deceased could not be known immediately.
Begumganj Model police station's Officer-in-Charge Harunur Rashid said: "The pickup van overturned when its driver lost control at the steering while overtaking a rickshaw, leaving one dead on the spot."
The injured were rushed to Upazila Health Complex and Noakhali General Hospital, he added.
Resident surgeon of Noakhali General Hospital Syed Mohiuddin Abdul Azim said: "Twelve people were brought to our hospital; three of them had died before reaching the hospital."
Some of the injured are in a critical condition, he added.
Nineteen workers had boarded the pickup van from Feni to reach their workplace at Begumganj’s Bangla Bazar, the OC said.