The detainee is Abdus Shukur, 35, son of Tabir Rahman of Nutanpara village of Chuadanga's Jibannagar upazila.
Later, the gold bars worth around Tk 5.1 million were recovered from his possesion, the officer said.
A case will be filed against the detainee, he said adding that the gold bars will be handed over to Darshana police.
In Jhenaidah, a special patrol team of Jadavpur BOP under Maheshpur Battalion conducted an operation in Gopalpur village in Maheshpur upazila.
During the drive, 85 gold bars weighing 11.390 kg were recovered by digging soil in a banana orchard.
The seized gold worth over Tk 8 crore will be deposited at the Jhenaidah Treasury Office after filing a case at Maheshpur Police Station, said Saiful Islam.