Group Captain Arun Marwaha, 51, was detained on January 31 by the air force’s Intelligence Wing with his smartphone at the IAF headquarters. He was questioned by the air force and handed over to the Delhi Police on February 7.

“We have arrested a senior officer of the Indian Air Force. He has been booked under the Official Secrets Act. Further investigation is on,” MM Oberoi, special commissioner (special cell) of Delhi Police, said without divulging further details.

Marwaha was honey-trapped by ISI agents using two accounts of a social networking site in December 2017, police said. He allegedly engaged in seductive conversations with the agents masquerading as models.

Police said they have not found any evidence of monetary exchange and added that he was passing classified information in lieu of sex chats.“We have found some objectionable conversations and pictures on his mobile phone,” an investigating officer said.