A total of 47 prisoners who are Myanmar nationals have been quarantined in Cox's Bazar district jail.
All of them belong to the Bushiest community.
Superintendent of the jail Md Mokammel Hossain said the division ward was prepared for quarantine purposes and the 47 prisoners were kept there.
"But after three days of intensive observation, no symptom of the virus was found among them," he said.
Police arrested the 47 Myanmar citizens as they had entered Bangladesh for selling wood without legal documents.
Mokammel said they had been kept in quarantine since March 15.
"At present, people are passing a period of anxiety in Bangladesh and abroad. So, the jail authorities decided to put the new prisoners in quarantine," he said.
He also said prisoners who would come to the jail would be taken to the main prison ward after a 14-day quarantine.
"A separate ward has been prepared for this," he added.