The incident took place yesterday at a bus stand, where the buses were parked for the night. Nobody was hurt, investigating officer and head constable Hukma Ram said.
A hunt was on to nab the accused who are yet to be identified, he added.
Nagaur district has been tense since June 24 when gangster Anandpal Singh, on the run since September 2015, was gunned down by the police in Malasar village in Churu.
The SP of Nagaur said the body was kept in a deep freezer at his house where elaborate security arrangement was made. Police were allowing people to enter the village only after verifying their identity.
The Rajasthan government has offered a SIT probe but Anandpal's family is sticking to its demands. The Rajput community is organising a 'shrandhanjali' rally in the slain gangster's native village Sanvrad today.
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