A class action suit against Gandhi was filed by Sikhs for justice (SFJ), a US-based human rights group, along with victims of the November 1984 under Alien Tort Claims Act (ATCA) and Torture Victim Protection Act (TVPA).
Sonia Gandhi is currently in the US for regular medical check up.
SFJ legal counsel Gurpatwant S Pannun said federal court Judge Brian M Cogan's order further directs the hospital and security staff to give summons and complaint to Gandhi personally in the hospital.
Gandhi is currently in the US for regular medical check up. 66-year-old Gandhi, who had undergone a surgery in the US for an undisclosed ailment on August 5, 2011, had flown there for a check-up in February and again on September two last year.