Over Rs 2.72 crore Indian currency was seized by customs officials from several boxes of a container at the southwestern Chittagong Port on September 20.
A Monrovian flag carrier "MV Prosper" carried the currency from United Arab Emirates' Fujairah Port to Chittagong port.
An expatriate Bangladeshi living in Dubai and identified as Mohammad Shahiduzzaman has been found to have sent the container, declaring the materials inside as "home appliances".
Police so far has arrested five people including the younger brother of the consignee and clearing and forwarding agent of the consignment for their suspected involvement in the haul.
"We (Chittagong Metropolitan Police) have been asked to handover the case to Criminal Investigation Department (CID)," a police spokesperson said in the port-city.
He added that Cyber Crime Squad of the CID's specialised Organised Crime Section has appointed its inspector Liton Dewan as the investigation officer in the case, state-run BSS news agency reported.