The National Investigation Agency (NIA) is questioning Anees-ul-Islam, son of separatist leader Altaf Ahmed Shah, now lodged in Delhi's Tihar Central Jail, in its investigation into terror funding.
A senior NIA official told IANS: "Islam was summoned to appear before the NIA."
Islam is the grandson of Hurriyat Conference leader Syed Ali Shah Geelani, who advocates Jammu and Kashmir's merger with Pakistan. Islam's father is married to Geelani's daughter.
The NIA arrested Islam's father in 2017.
It registered a case of terror funding for the violence in the Kashmir Valley in May and July 2017.
Besides Shah, the agency has arrested Aftab Hilali Shah alias Shahid-ul-Islam, Ayaz Akbar Khandey, Farooq Ahmad Dar alias Bitta Karate, Nayeem Khan, Altaf Ahmad Shah, Raja Mehrajuddin Kalwal and Bashir Ahmad Bhat alias Peer Saifullah.
Shahid-ul-Islam is an aide of the Mirwaiz while Khandey is the spokesperson for the Geelani-led Hurriyat Conference.