The deceased were identified as Runa Akter, her minor son Mir Hossain, children Miraz and Abdur Rahim and CNG driver Sumon. All of them were CNG passengers.
The accident took place when the jeep collided with the CNG in the area around 7 pm, leaving trio dead on the spot, said Md Ruhul Amin, officer-in-charge of Chandraganj police station.
On information, police recovered the bodies and sent to Noakhali General Hospital morgue for autopsy while the injured were admitted to the hospital.
Later, doctor referred Mohammad Ullah and Ruby Akhter to Dhaka for better treatment.