Parbat Singh, who hailed from Gujarat, was a local BJP activist, a senior police official said.
He was stopped by the culprits last night while he was returning home in a jeep near Bhatana area.
"Singh was attacked by some people of local Koli community over some old enmity. It may also involve political rivalry," Superintendent of Police Sirohi, Loveli Katiyar, said today.
Several teams have been dispatched to different locations in search of the accused, she said.