The arrestees are Amanullah Bhuiyan, Kajal Rekha, Yasin Arafat Keramat and Nomanur Rahman Khan.
Counterfeit notes of Rs 1.5 million (15 lakh) and mobile phones were recovered from them, said a DMP media release.
During the interrogation, the arrestees said that they had for a long time been collecting counterfeit Indian Rs 500 and Rs 1000 super notes from Pakistan through international channels and smuggling it through various products - either in person or through courier service from Rajshahi and Chapainawabganj areas, the DMP release added.
Arrested Aman Ullah Bhuiyan is a government vehicle driver of Sunamganj district Narcotics Control Department. And Kajal Rekha is the second wife of Aman Ullah.
A case has been filed against them at Hazaribagh police station.