Gangster Abu Salem was convicted by a Delhi court in connection with an extortion case dating back to 2002.
The court found Abu Salem guilty of demanding Rs five crore as protection money from a Delhi-based businessman.
While convicting Abu Salem, Additional Sessions Judge Tarun Sehrawat posted the matter to July 30 for hearing arguments on the quantum of sentence.
The court, however, acquitted the other accused -- Chanchal Mehta, Majid Khan, Pawan Kumar Mittal and Mohammad Ashraf -- citing lack of evidence against them.
One of the accused, Sajjan Kumar Soni, had died during the trial.
In the extortion case lodged in Delhi, it was alleged that Salem had demanded Rs five crore as protection money from businessman Ashok Gupta, a resident of Greater Kailash in south Delhi, in 2002.
Salem was convicted under sections 387 (putting person in fear of death or of grievous hurt, in order to commit extortion), 506 (criminal intimidation) and 507 (criminal intimidation by an anonymous communication) of the Indian Penal Code.
He faces a maximum punishment of seven years in jail.
Advocate M S Khan, appearing for Salem, had denied the allegations levelled against his client and contended that the trial in the case violated the order by which the gangster was extradited from Portugal to India.
Salem, who was extradited from Portugal in November 2005, is facing various other cases, including those related to the 1993 Mumbai blasts. He is currently in judicial custody.
(With PTI inputs)