The driver of the truck has also been hospitalised, the officer added.
Four persons, including a civic volunteer, died and at least 15 people were injured, after a speeding truck rammed into two vehicles and turned turtle in West Bengal's Uttar Dinajpur district, police said.
The accident took place late on Wednesday near Tungidighi Bus Stand at Karandighi on National Highway-12, they said.
"The speeding truck first collided with two moving vehicles before it overturned, killing the civic volunteer and three people including a cyclist, and injuring 15 others," a senior police officer said.
The injured are undergoing treatment at the Raiganj Medical College and Hospital.
The driver of the truck has also been hospitalised, the officer added.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)