During an in-chamber hearing, the NIA told the court that it needs Malik's handwriting sample as it has recovered some documents from the possession of co-accused Shakir Hussain Sheikh alias Chota Hafiz, who was killed in an encounter with security forces on December 20 last year in Kishtwar in Jammu and Kashmir, sources said.
The sources said that the agency told District Judge (DJ) I S Mehta that it needs to ascertain whether the recovered documents contain handwriting of Malik or not.
Meanwhile, the court also listed for hearing on the same day the matter related to framing of additional charge of waging war against India against Malik for his alleged role in the September 7, 2011 terror attack at the high court's reception in which 15 people were killed and 79 were injured.
The trial judge had earlier declined the NIA's plea to prosecute Malik under the stringent charge which entails maximum punishment of death penalty, but the High Court had ruled otherwise.