Rejecting the appeals by the convicts against the trial court's verdict, the high court said the offences were "completely revolting" and committed in an "extremely fiendish, demoniac, barbaric and nefarious manner".
"Exemplary punishment is, therefore, the need of the hour, for, if this is not the rarest of rare cases there is likely to be none," it said.
"We conclude by stating the obvious that a strong message needs to be sent to the perpetrators of grotesque and ghastly crimes against women that such crimes shall not be countenanced, though we confess that we are not aware of any case in which a crime of such dimensions has been committed hithertobefore.
"We cannot also but be conscious of the fact that the gruesome manner of the execution of the crime in the instant case is in a sense unparalleled in the history of criminal jurisprudence and that if the rising trend towards such crime is not nipped in the bud and arrested at its inception, the poison is likely to spread like wild fire through the social order, rendering it hapless and defunct," a bench of justices Reva Khetrapal and Pratibha Rani said.
"The offence in the present case has indubitably been committed in an extremely fiendish, demoniac, barbaric and nefarious manner. Also the manner in which the offence has been committed is demonstrative of exceptional licentiousness and perversion of a superlative degree.