Trinamool BNP Chairperson Shamsher Mobin Chowdhury has been arrested by police.
He was detained from the Mohakhali area of the capital on Thursday (17 October), said Dhaka Metropolitan Police Joint Commissioner (DB-North) Rabiul Hossain Bhuiyan.
On 16 October, Shamsher Mobin Chowdhury and his wife were sent back from Dhaka airport.
The immigration police allegedly did not allow them to board their flight without clearance from "top-level" authorities. Shamsher Mobin said they were headed to Bangkok for his wife's medical treatment.
Shamsher Mobin Chowdhury, a former vice-chairman of the BNP, resigned from all his BNP positions in 2015.
He later joined Bikalpa Dhara Bangladesh in 2018 and, in September 2023, became the chairperson of Trinamool BNP, which was registered as a political party prior to the last national elections.