After a slight decrease from severe levels, the mercury is hovering around 40 degrees Celsius in most regions
The incident took place around 4:30am Wednesday at Raninagar Railway Station, said Santahar railway police OC Akbar Hossain.
Six people fell off the roof of Dinajpur-bound Drutojan Express after hitting their heads against a footbridge at Raninagar. Four people died on the spot. The victims could not be identified immediately.
The two injured were taken to the Naogaon Sadar Hospital, the OC told bdnews24.com.