The court sent Group Captain Arun Marwah to custody after he was produced before it on the expiry of police custody.
Marwah, booked under the Official Secrets Act (OSA), was handed over to the Special Cell of Delhi police after being interrogated for nearly 10 days by the counter intelligence wing of the IAF, the police said.
According to the police, Marwah, who was posted at the Air Force headquarters, was allegedly leaking classified documents to a woman through WhatsApp.
He had befriended her through Facebook in December last year, the agency said.
The counter intelligence wing is also probing whether he was part of a larger espionage ring.
Punishment under the Official Secrets Act entails a jail term of up to seven years.
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