Rajarathinam took out a bottle of kerosene, poured the content over his body and set himself ablaze in full public view, police said.
He was screaming while some persons tried to douse off the fire. However, he was rushed to a government hospital when he fainted and died after not responding to the treatment, police said.
Police said that the man had come to the RDO office where he had come to present a petition over some money transaction problem.