On March 12, 1993, a series of blasts in quick succession had rocked Mumbai, killing 257 people and injuring over 700.
Salem, who was extradited from Portugal in 2005, was awarded life term in the case by a designated TADA court in Mumbai in September last year.
Two convicts, Tahir Merchant and Firoz Abdul Rashid Khan, were handed down death penalty in the case by the trial court.
Besides Salem, the TADA court had sentenced Karimullah Khan to life imprisonment while fifth convict, Riyaz Siddiqui, was awarded a ten-year sentence in connection with the case.
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This was the second phase of trial in the 1993 blasts cases.
These accused were facing multiple charges which included criminal conspiracy, waging war against the State and murder.
The trial of Salem, Merchant and others was separated from the main case as they were arrested subsequently.
Memon was executed after the top court, during a historic midnight hearing, had rejected his plea.