17-year-old Md Israfil and 15-year-old Robeya Khatun were married about eight months ago
Dhaka Customs House Commissioner Lutfor Rahman said the passenger, Ataur Rahman, posed as a patient on a wheelchair.
He was carrying the gold in bars and ornaments in his belt and other parts of his body, Lutfor said.
The estimated market value of the seized gold is around Tk 120 million, he added.