In Jhenaidah, two women were killed and eight others suffered injuries when a truck hit a human hauler in Laudia area of Sadar upazila on Saturday.
One of the deceased was identified as Poly Khatun, 40, wife of Alauddin from Bishoykhari village. The other woman could not be identified yet.
Dilip Kumar Sarkar, officer of Jhenaidah Fire Service Station, said the Kaliganj-bound human hauler was hit by a sand-laden truck from behind.
Poly Khatun died on the spot. Nine other injured passengers were taken to the Sadar hospital where another woman succumbed to her injuries.
Although police seized the truck, its driver managed to flee, the officer added.
In Sylhet, two cousins were killed and three others injured in a head-on collision between two CNG-run auto-rickshaws at Kamargram village in Beanibazar upazila at noon.
The deceased were identified as Tahmina Akter, 18, and Tinni Begum, 8, both were continued their study staying at their grandfather house at Kakardia in the upazila.
Jahidul Haque, officer-in-charge of Beanibazar Police Station, said the two cousins were going to attend a marriage ceremony.
The accident took place when an auto-rickshaw from Beanibazar collided with another auto-rickshaw in the area, killing Tahmina on the spot while four others injured.
Later, they were taken to MAG Osmani Medical College Hospital but Tinni died on the way. The bodies were sent to the hospital morgue, the OC added.
In Barishal, a mother and her son were killed and four others got others goinjured in a head-on collision between a three wheeler and a truck on Patuakhali-Barishal Highway in city at noon.
The deceased were identified as Delwara Begum, 60, and her son Shipon, 35, residents of Shreeram village in Nalchhiti upazila of Jhalakati district.
Quoting eyewitness, Sub-Inspector Nazmul of said a truck collided the three wheeler as its driver lost control over the steer around 1pm, killing the mother on the spot and five others injured.
Later, they were taken to Sher-e Bangla Medical College Hospital where the doctors declared Shipon dead.
The bodies were taken to hospital morgue for autopsy, the SI said.
Meanwhile, police seized the truck and arrested its driver.