Constable Lalaram, who had gone to a quarry to check illegal mining, was killed at Kairant Mod in Alwar district last night, circle officer Bhiwadi Siddhant Sharma said.
"He tried to stop the dumper, which was carrying stones from the mine, but the driver did not stop and crushed him," he said.
The dumper owner, Tamim, and his brother, Wasim, who was driving the vehicle, had been arrested, he said.
The body of the constable, who was attached to the Chupanki police station in Alwar, was handed over to his family, he said.
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