The NCB, which conducted raids to seize the contraband, also stumbled on 100 kg of Red sanders logs and handed it over to local police.
Based on a tip-off that Ketamine was being smuggled to Bangkok from here via Kolkatta, NCB sleuths apprehended Siccandar Ali at the airport yesterday and seized 9.8 kg of Ketamine concealed in a ladies' bag, an NCB press note said.
During questioning, Ali, a native of Sivaganga district in Tamil Nadu, disclosed that the remaining narcotic was hidden in a house of his associates.
NCB officials found that the house was being used as a centre for packing and concealing drugs.
Investigators are also ascertaining if there is any link between the seizure of 4.900 kg of Ketamine at the airport early this month. It was seized from one Shah Jahan and was to be sent to Malaysia.