PT resident and MLA, K Krishnasamy said some cracker manufacturers had thrown waste material on the road side, which caught fire around 7.30 PM yesterday when the workers were returning home.
Spark from the fire spread on the diesel tank of the van, which fell into a gorge and exploded, leading to the death of these workers, he said.
Krishnasamy demanded that the State Government bring to book those who dumped cracker waste illegally on the road.