"The incident occured this morning when a nomad identified as Manna and his son were trying to melt some scrap material in a vacant land," Additional SP Kota City Laxman Gaur said.
"The victims were rushed to a nearby hospital where Munna, his eight-year-old son Kamal and another person Girraj were declared brought dead," he said, adding the condition of the injured was stated to be out of danger.
"They all are nomads locally called as Gadia Luhar (members who travel from one place to another for pasture), and were residing in the area," the officer said.
A case has been registered and investigation is on to find out the exact cause of the blast, the ASP said.
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