During search of the vehicle, police found 1300 counterfeit notes of Rs2000 denomination and 20 fake notes of Rs500 denominations.
The notes were kept inside the speaker box of the car in which they were travelling
Three persons were armed with country-made revolver and knife, and their act was caught on the CCTV camera based on which the police launched a search operation.
According to 2015 census, the population of Asiatic lions was estimated to be 523.
Rupani was addressing his relatives and acquaintances after having darshan of his community deity in Chanaka village of Bhesan taluka in Junagadh district
The 28-year-old constable was an unarmed Lok Rakshak Dal member, who had joined the police force less than five years ago and was a fixed-salary employee.
While police have questioned more than half-a-dozen-persons in connection with the murder and robbery, this is the first arrest so far in the case.
Police said that the complainant and his sailors had to be hospitalised due to the injuries they sustained in the assault.
Acting on a tip-off, police chased the car and managed to intercept it near Mokar village at around 10 pm Thursday.
Police said that the accused were also booked for forgery and for producing forged documents as real.