The Air Intelligence unit of Customs department Wednesday seized 278.83 grams of gold from two passengers at the Biju Patnaik International Airport here, customs official at the airport said. The cost of the seized gold is an estimated Rs 9.08 lakh, said the officials who intercepted the two passengers following on spot intelligence. The passengers hailed from West Bengal and Jharkhand. They had arrived from Bangkok. On searching their luggage the officers found white gold rings of foreign origin having purity of 99.99 per cent concealed under buttons of garments and seized those, the official said. The two persons were detained for questioning and investigation into the incident is underway, the official said.