India, May 9 -- The Enforcement Directorate (ED) is investigating whether a 53-year-old man, arrested last month for allegedly selling fake identity documents to Bangladeshi nationals, used the funds for terrorist activities, the agency told a Kolkata court on Thursday.

Azad Mullick, 53, alias Ahmed Hussain Azad, a prime suspect in the passport case, was arrested on April 15 from Birati in North 24 Parganas district. He was initially identified as Azad Mullick, a Bangladeshi national.

While seeking extension of his police custody for further interrogation on Thursday, ED told a Kolkata's city sessions court that documents running into 20,000 pages and WhatsApp chats with Pakistani citizens were recovered from the two mobile phones seize...