The man who was detained for taking photographs of Finance Minister P Chidambaram at the Chennai airport yesterday has been arrested and remanded for two weeks.
The 34-year-old man, Ameer Tawah, belongs to Kerala.
He had a first-class ticket to fly from Chennai to Dubai via Delhi. That circuitous route - instead of a direct flight to Dubai - is among the explanations he has been asked to furnish.
Last month, Mr Tawah and another passenger who boarded an Air India Dreamliner flight to Delhi were interrogated after they took photos of the plane before insisting that they be allowed to leave the aircraft because they were unwell.
They reportedly provided contradictory information to the security officials who had questioned them at the time.
Last month, the arrest of a man in Tamil Nadu who posted tweets against Mr Chidambaram's son, Karti, was criticised as an over-reaction in a fierce debate online.(With inputs from PTI)