The Air Intelligence Unit of the Air Customs has seized 10,500 memory cards from a passenger, hailing from Tamil Nadu, who arrived at the international airport here from Singapore on Wednesday night.

Murugan Ramar, 29, a native of Ramanathapuram, was arrested on Thursday morning and produced in the Economic Offences Court at Kochi, Customs officials said.

The passenger, who arrived from Singapore, was questioned by AIU investigators as his passport showed that he was a frequent traveller through Chennai airport. The subsequent frisking led to the seizure of the cards that were strapped on to his legs. The memory cards were worth Rs.31.50 lakh, officials said.