A bench headed by Chief Justice of India Altamas Kabir said it was keeping the matter pending since another bench, which has heard an identical plea, has reserved its judgement.
"In our view, the proper course of action is to adjourn the matter until another bench renders its judgement on similar matters. Therefore, accordingly we adjourn the hearing of this matter for six months to enable another bench to deliver the judgement in another pending matter.
"As a consequence, the interim order staying the execution of petitioners (Veerappan aides) passed on February 18 shall continue" until further orders, the bench also comprising justices A R Dave and Vikramajit Sen said.
The bench noted that the subject matter of the petition was relating to the right of the death row convicts to get their sentence commuted to life imprisonment on account of delay of execution of their death sentence.
"This is the main question involved when this matter was taken by us. It was brought to our notice that other writ petitions involving the same issue were heard by a bench of two judges in which senior advocates Ram Jethmalani and T R Andhyarujina were requested as amicus curiae," the bench said.
Veerappan's elder brother Gnanaprakash and his aides Simon, Meesekar Madaiah and Bilavendran were awarded death sentence in 2004 in connection with a landmine blast at Palar in Karnataka in 1993 in which 22 police personnel were killed.
Their mercy petition was rejected by President Pranab Mukherjee on February 13 and they are presently lodged in a jail in Belgaum in Karnataka.
A TADA court in Mysore had in 2001 sentenced them to life term which was enhanced to death sentence by the apex court.
Gang leader Veerappan was killed in an encounter with the Tamil Nadu Police in October 2004.