Undeclared gold worth more than Rs 7 lakh was seized from a passenger who arrived at the Kozhikode airport from Bahrain, a Customs official said on Tuesday. The seizure was made yesterday when officers of the Air Intelligence Unit, acting on a tip-off, intercepted Sameer Mykulangara Thaza, a native of Kozhikode, and searched him, Customs Commissioner Sumit Kumar said in a release here.