New Delhi: On Friday, a special Terrorist and Disruptive Activities (Prevention) Act court convicted six out of the seven accused, including Abu Salem and Mustafa Dossa after 24 years later when the 12 blasts rocked the city killing 257 and leaving 713 grievously injured.

Key mastermind of the 1993 Mumbai blasts case Mustafa Dossa, extradited gangster Abu Salem along with Feroz Khan, Taher Merchant, RiyazSiddiqui, Karimulla Khan were convicted by a special TADA court in Mumbai.The court said that, “Mustafa Dossa, Abu Salem, Tahir Merchant and Firoz Khan were among the main conspirators of '93 blasts case.”

Salem was found guilty of transporting weapons from Gujarat to Mumbai ahead of the blasts, while Dossa was convicted on charges of conspiracy and murder under various sections of the IPC besides offences under the TADA Act, the Arms Act and the Explosives Act.

The dastardly attacks had left 257 dead, 713 persons seriously injured and destroyed properties worth Rs 27 crore.

Earlier, the court had dropped certain charges against Salem in 2013 after the investigating agency -- the Central Bureau of Investigation -- moved a plea,saying those charges were against the extradition treaty between India and Portugal.

In the first leg of the trial, the Tada court had convicted 100 accused in the case and acquitted 23 people. And now the court has set the next hearing date on June 19 to decide the date for argument on quantum of sentence.