In the first leg of the trial that concluded in 2007, the TADA court had convicted 100 accused in the case, while 23 people were acquitted.
The trial of the seven accused -- Abu Salem, Mustafa Dossa, Karimullah Khan, Firoz Abdul Rashid Khan, Riyaz Siddiqui, Tahir Merchant and Abdul Quayyum -- were separated from the main case as they were arrested at the time of conclusion of the main trial.
Abu Salem was accused of transporting weapons from Gujarat to Mumbai. He also handed over to actor Sanjay Dutt, who was an accused in the case for illegally possessing weapons, AK 56 rifles, 250 bullets and some hand grenades at his residence on January 16, 1993. Two days later on January 18, 1993, Abu Salem and two others went to Sanjay Dutt's house and got back two rifles and some rounds.
The court had dropped certain charges against Abu Salem in 2013 after the investigating agency --CBI-- moved a plea, saying those charges were against the extradition treaty between India and Portugal.
Mustafa Dossa is said to have masterminded the landing of explosives including RDX in India and sent some youth to Pakistan to acquire arms training. The court, in all, recorded statements of around 750 prosecution witnesses and 50 witnesses. Three accused including Abu Salem had confessed to their crime during investigations carried out by the CBI over the years into the blasts case.
Though the hearing in the case began in 2007, it was delayed as three petitions were pending with the Supreme Court, one each filed by Mustafa Dossa and Abu Salem, and another by the CBI.
The trial resumed in 2012 and concluded this year in March. The case (involving the seven accused) was first heard by judge Pramod Kode, who had also delivered the judgement in the first leg of the trial and convicted 100 accused and acquitted 23 in 2007.
Later, judge DU Mullah presided over the TADA court, and the case is now being heard by judge GA Sanap.
It was during the trial in 2013 that the Supreme Court pronounced a judgement on appeal filed by all the accused wherein key conspirator Yakub Memon's death sentence was confirmed, while that of others (all bomb planters) were commuted to life imprisonment.
Sanjay Dutt and many others surrendered before the TADA court in Mumbai in May 2013 after the Supreme Court upheld their conviction.
On March 12, 1993 Mumbai witnessed an unprecedented terrorist attack when a series of 12 bomb explosions took place one after another in a span of about two hours.
The blasts took place at the Bombay Stock Exchange, Katha Bazaar, Lucky petrol pump near Sena Bhavan, opposite Passport office near Century Bazaar, Fishermen's colony at Mahim Causeway, at basement of Air India Building, Zaveri Bazaar, Hotel Sea Rock, Plaza Theatre, Centaur Hotel (Juhu), Sahar Airport (Bay no.54) and Centaur Hotel (near Mumbai airport).
This was the first ever terrorist attack in the world where RDX (Research Department Explosive i.e cyclotrimethylene trinitramine) was used on such a large scale since the Second World War.
According to the prosecution, in order to avenge the demolition of the Babri Masjid, members of the crime syndicate under the fugitive terrorist Dawood Ibrahim along with other absconding terror masterminds Tiger Memon, Mohammed Dossa and Mustafa Dossa (who is presently facing trial) hatched a conspiracy to commit acts of terrorism in India.
The prosecution said that the aim of the crime was to commit terrorist acts with an intent to overawe the Government of India, to strike terror on the people of India, alienate section of society and to harm communal harmony.
It said that the terror conspirators smuggled fire-arms, ammunition, detonators, hand grenades and highly explosive substances like RDX into India and stored it.
According to the prosecution, Mustafa Dossa, Tiger Memon and Chhota Shakeel organised training camps in Pakistan and in India to impart and undergo weapon and arms training and handling of explosives. They also sent men from India to Pakistan via Dubai for arms training.
The prosecution also said that the conspirators held 15 meetings before the execution of the blasts.