A Delhi court on Tuesday remanded underworld don Abu Salem, who was brought from Mumbai in connection with an extortion case, to seven days in police custody.

Salem was produced before the Chief Metropolitan Magistrate Seema Maini at the Tis Hazari courts following a production warrant against him in connection with an alleged extortion call he made to a south Delhi-based businessman.

The gangster, who had been lodged in Mumbai's Arthur Road Jail after his extradition from Portugal in 2005, had six years ago allegedly demanded Rs 1 crore from Rajat Nagrath, the owner of Allied Communications.

Though there are four cases registered against him in Delhi, he can be tried in only three cases mentioned in the extradition agreement with Portugal. Salem is facing trial in eight cases.

The court had earlier issued production warrants at three occasions against Salem but a Mumbai court had stayed his production here on his lawyer's plea on security grounds.

Salem was brought to the capital on Monday evening by a team of Anti-Terrorist Squad of Mumbai Police on the Golden Temple Express.

The gangster, an accused in the 1993 Mumbai serial blasts, was brought in a second class compartment of the train.