Delhi Chief Minister Arvind Kejriwal on Monday called the incident of a woman's body being dragged for four kilometres by a car after hit her scooter a "rarest of rare" crime and demanded that the accused be given the strictest punishment.

"It is a rarest of rare crime. I don't know where society is heading. I have learnt that the postmortem is underway, " he told reporters at a ceremony to flag off 50 electric buses.