CBI team investigating the conspiracy behind ISRO espionage case has filed an FIR in the Thiruvananthapuram Chief Judicial Magistrate Court. The FIR names 18 former Kerala Police and Intelligence Bureau personnel as accused including former Pettah station Inspector S Vijayan and Pettah station Sub-inspector Thambi S Durgadath. The espionage case began in 1994, when Narayanan, along with another top ISRO employee, two Maldivian ladies, and a businessman, were detained on espionage accusations.