The airport's customs officials arrested a Botswana national at Hazrat Shahjalal International Airport (HSIA) with over 3kg of heroin on Sunday afternoon.
The arrestee is identified as Lesedi Molapisi, 30.
National Security Intelligence (NSI) of the airport challenged the woman when she was crossing the green channel at around 5:30pm and found eight polybags inside carrying 3.145kg heroin after opining a luggage.
The seized heroin worth some Tk20 crore, added the release.
Samples from the seized drugs will be sent to the Department of Narcotics Control for further laboratory tests.
Necessary action will be taken upon further investigation, added the release.