Chidambaram was proceeding to Coimbatore airport after attending a function at Udumalpet in Tirupur District, when the incident occurred, police said.
The escort vehicle hit the autorickshaw with five passengers as it was turning into the main road from an adjacent road, and in the impact, the occupants were thrown out, the sources said.
The injured were treated as outpatients at a private hospital, police said, adding, the driver and another male passenger were unhurt, they said.