Two inebriated men inside the car were arrested, the police said.
The injured police personnel were identified as assistant sub-inspector Shiv Kumar, head constable Ved Prakash and constable Santlal.
The car ploughed into the PCR van around 1 am on Pushta Road. The three policemen were on night duty.
Kumar and Prakash were discharged from a hospital after first aid. Santlal was admitted to SDN Hospital, the police said.
The accused were identified as Manish Kashyap (25), who was driving the car, and Abhishek.
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