The judicial custody of suspected militants Wasim Akram Malik and Amir Abbas Dev, arrested for their alleged involvements in the September 7 blast in the Delhi High Court premises, was extended on Monday by a Delhi court for another 14 days.Special NIA judge H S Sharma extended their custody in an in-camera court proceeding till January 2, 2012 on a plea by the National Investigation Agency that the probe into the blast, which killed 15 people and injured 70, was still going on.After closing down on Saturday for winter vacation, the trial courts will reopen on January 2.Malik and Dev were produced before the court on Monday after the expiry of their judicial custody.