The detainee has been identified as Shivkumar Sahane, an employee of a well known property website, DCP (Zone VI) Sangramsingh Nishandar said, adding, two more detentions are likely in the case.
Three people were seen using a remote-controlled drone yesterday flying at a height of about 55 feet, the police official said.
"The drone flew for nearly 25 minutes over the BARC campus," the police official said.
The incident occurred at about 12.30 PM, which was witnessed by a professor who videographed the entire incident on his mobile phone and submitted it to the police, the official said.
He said the professor who was passing by is an eyewitness in the case.
A case has been lodged at the Trombay police station and the police located Sahane with the help of the professor's video recording, after which he has been detained for questioning, the police official said.
The detainee told the police that the BARC campus was photographed to upload it onto the property website, according to the police official said.
The police has not made any arrests so far but the trio could be booked for illegally using drones without having permission from concerned authorities or the police, he said.