Police said the executive was allegedly in an inebriated condition when the incident happenedon Saturdaynight.
All three persons injured were travelling in the autorickshaw on G M Palya Road, near Indiranagar when they were hit by the car.
A case was registered at Indiranagar Police station under Section 279 and 337 of the Indian Penal Code (Rash driving or riding on a public way, and Causing hurt by act endangering life or personal safety of others) read with 185 of the Indian Motor Vehicles Act (Driving by a drunken person or by a person under the influence of drugs).