New Delhi: The Special Cell of Delhi Police arrested the prime suspect in connection with an espionage operation involving Pakistani Intelligence Operatives (PIOs).The accused was identified as Hasin, a resident of Gangora, Deeg, Rajasthan. His brother, Kasim, was arrested earlier in this case.Confirming the arrest, Additional CP Pramod Kushwaha said that the suspect had been in contact with ISI officials for many years. He allegedly sent a SIM card to Pakistan through his brother Kasim in Aug 2024, which was later used by a PIO.Further interrogation revealed that Hasin shared photographs of sensitive army establishments with the PIO and received money in return. He also provided an OTP to activate a WhatsApp account in Pakistan.The accused were clicking pictures and noting down timings of the movement of vehicles and army personnel at Alwar military station.“In return, Hasin’s ISI handlers facilitated Pakistani visas for his younger brother Kasim, his brother-in-law, and his sister during their visit to Pakistan in Aug 2024,” said an officer.Hasin visited Pakistan about 15 years ago, where he has relatives, and was tapped by the ISI. Kasim, a resident of Bharatpur in Rajasthan, visited Pakistan twice in Aug 2024 and March 2025, staying for about 90 days and meeting ISI personnel.The probe revealed that three ISI officers were providing them with training at a Pak army base in Lahore, officials said. Two of them were known by their aliases, viz Shah Ji and Tauji, while the third was identified as Waqas.