Police have arrested 10 people from different parts of the city on charge of trying to harm relations between Bangladesh and the United States.
The raids came after deposed Prime Minister Sheikh Hasina recently urged her Awami League leaders and activists to hold processions carrying the US flag and photos of US president-elect Donald Trump.
Hasina has been living in India since a student-led mass upsurge ousted her government on August 5 ending her 15-year rule.
Authorities said Hasina's directive in a telephone call is part of a conspiracy to destabilise the country and hurt Dhaka-Washington relations.
In a statement Dhaka Metropolitan Police said the raids were conducted on Saturday night following intelligence reports and arrested the men for their alleged involvment in the conspiracy.
During the operation, a large number of provocative posters, images, placards, and cash were seized from their possession, said the statement.
The Dhaka Metropolitan Police remains vigilant in thwarting any plots against the state. Operations to arrest the instigators, financiers, and all those involved in these criminal activities are ongoing, according to the statement.