At least 125 families have been kept in isolation in four districts after three people died with coronavirus-like symptoms.
Besides, in some cases, relatives or neighbours of these families were either infected or suspected to be infected with the virus, said authorities.
In Narayanganj, about 100 families were kept in isolation in Bandar upazila after a 45-year-old resident in the area died on Thursday after being tested positive for coronavirus.
Shukla Sarker, upazila nirbahi officer (UNO) of Bandar, said the isolation was imposed in the area following directives of the Institute of Epidemiology, Disease Control and Research (IEDCR).
In Satkhira, at least 20 families were kept in isolation in Sadar upazila following the death of a college student who was suffering from fever and respiratory disease.
Hossain Safayat, civil surgeon of Satkhira, said they sent the sample of the dead body to IEDCR for test and the families would be kept in isolation until the test result gets published.
In Sunamganj, the family of a ready-made garments worker who died with coronavirus-like symptoms on Wednesday was kept in isolation in Tahirpur upazila.
Shams Uddin, civil surgeon of Sunamganj, said body of the 22-year-old man was taken to his home. On information, the district administration rushed to the spot, buried the body and kept his family in isolation following IEDCR's directions.
In Bogura, local administration kept at least three families in isolation as a 45-year-old man got admitted to hospital with coronavirus-like symptoms.
Meanwhile, two patients were undergoing treatment in isolation wards of two hospitals in the port city as they were suffering from fever and coughing.
Seikh Fazle Rabbi, civil surgeon of Chattogram, said samples from their bodies were sent for tests.
In Brahmanbaria, the government officer in Bancharampur upazila who was sent to IEDCR on April 1 as he had flu-like symptoms has been tested negative for coronavirus, said Mohammad Ekram Ullah, civil surgeon of the district.
In Kushtia, local health officials yesterday collected samples of a navy man, who died on Thursday night with flu-like symptoms to check whether he was infected with Coronavirus, said Anwarul Islam, the district's civil surgeon.
Local administration has locked down the dead's father-in-law's house in Meherpur Sadar upazila where the victim resided for few days before his death, said the civil surgeon.
Our Satkhira, Narayanganj, Sylhet, Kushtia, Chattogram, Bogura, Faridpur and Brahmanbaria correspondents contributed to this report