Several conspirators and masterminds of the worst terror attack on the country including underworld don Dawood Ibrahim, his right hand man Chhota Shakeel and Memon's elder brother Tiger Memon are still absconding and are believed to be sheltered in Pakistan.

Following is the chronology of events in the case:

* March 12, 1993: A series of 13 explosions rock Mumbai resulting in 257 fatalities and injuries to 713 others.

* April 19: Actor Sanjay Dutt (accused number 117) arrested.

* November 4 : Over 10,000 page-long primary chargesheet filed against 189 accused, including Dutt.

* November 19: Case handed over to CBI.

The Supreme Court discharged two more accused -- travel agent Abu Asim Azmi (now Samajwadi Party Member of Parliament) and Amjed Meher Baux.

* April 19: Trial commences.

* April-June: Charges framed against the accused.

* June 30: Two accused, Mohammed Jameel and Usman Jhankanan, turn approvers in the case.

* October 14: Dutt granted bail by the Supreme Court.

* March 9-July 18, 2001: Accused record their statements.

* February 20, 2003: Dawood gang member Ejaz Pathan produced in court.

* March 20, 2003: Mustafa Dossa's remand proceedings and trial separated.

* June 13, 2006: Gangster Abu Salem's trial separated.

* September 12: Court starts delivering the judgement, pronounces four members of the Memon family guilty, acquits three. 12 convicts awarded death penalty, while 20 were given life sentence.

* March 21, 2013: SC upholds death sentence of convict Yakub Memon, brother of Tiger Memon, and commutes death sentence of 10 convicts to life term. Life imprisonment of 16 out of 18 convicts also upheld.

* May 2014: President Pranab Mukherjee rejects Yakub's mercy plea

* June 2, 2014: SC stays Memon's execution on plea seeking review petitions in death cases to be heard in open court instead of chambers.

* April 9, 2015: SC dismisses Memon's petition seeking review of death sentence which was upheld by the Apex Court.

* July 21, 2015: SC rejects Memon's curative petition, the last legal remedy to avoid execution of death sentence.

* July 21, 2015: Hours after SC rejects Memon's petition, he files mercy plea to Maharashtra Governor.

* July 23, 2015: Memon's moves SC with a petition seeking stay on his execution scheduled for July 30.

* July 27: Supreme Court hears Yakub's petition seeking a stay on execution, adjourns the matter to July 28.

*July 28: As two-judge bench gives a spilt verdict, SC refers the case to a larger bench to be heard on July 29.

* July 29, 2015: Supreme Court rejects Memon's plea for staying execution, upholds dismissal of curative petition.

* July 29, 2015: He files fresh mercy plea to President.

* July 29, 2015: Maharashtra Governor rejects mercy plea, President also turns it down.

* July 30, 2015: Memon files fresh petition before Supreme Court seeking stay on execution. SC rejects it after an unprecedented pre-dawn hearing.

*July 30, 2015: Memon is hanged.

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