ASP Ram Chandra Yadav, aged 52, and his 30-year-old gunner Rishiraj Yadav were killed in the accident, police said.
The collision between the vehicle, carrying the ASP who is posted at Chandauli and his gunner, happened in Chandwak area in the morning, they said.
The driver of the ASP's vehicle was seriously injured.
The truck had been impounded and its driver arrested, police said.