The restriction will be effective from 8am on July 4 which will be in force till July 25.
DSCC Mayor Barrister Sheikh Fazle Noor Taposh said this in a briefing after a meeting at Nagar Bhaban on Tuesday.
He said that the 21-day lockdown will be implemented till July 25. A control centre will be set up there, booths will be set up for sample collection and there will be isolation system.
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"Everything will be closed there," the mayor said.
However, pharmacies and grocery stores will remain open.
Arrangements will be made to supply daily necessities in coordination with the E-Commerce Association, said Taposh.
Earlier, the Dhaka North City Corporation put West Rajabazar under lockdown from June 10 to contain the spread of coronavirus.