They are among 10 workers who came from the northern district of Chapainawabganj
Health authorities have detected seven cases of Indian variant of coronavirus from a group of workers at Dhaka's Nawabganj upazila.
Upazila Health Officer Dr Mohammad Shahidul Islam said on Saturday night that 10 workers, who came from Chapainawabganj district, were tested for coronavirus and seven of them were found to be infected with the Indian variant.
On May 18, the 10 workers came to join Matabpur Ashrayan Project at Nawabganj's Keilile union. They all came in a truck along with 63 other people.
As some of them were suffering from cough, cold and fever, the authorities on May 23 asked them to provide samples for Covid-19 tests, but they refused to do so.
On May 25, a separate medical team was formed and it collected samples from some of the workers. After laboratory tests, the results of 10 workers came out Covid-19 positive.
Apprehending the existence of Indian variant, the medical team sent the samples of the Covid-19 patients to the Institute of Epidemiology, Disease Control and Research (IEDCR) in Dhaka where doctors detected seven, out of the 10, infected with Indian variant on June 3.
All the infected patients are now undergoing treatment at the National Institute of Diseases of the Chest and Hospital (NIDCH), Dhaka.
"It's a dangerous sign and all of them have been asked to follow the government's health safety protocols," said Dr Shahidul.
The highly contagious Indian variant of the coronavirus was detected in Bangladesh for the first time on May 8.
Experts fear that Bangladesh may face the worst outbreak of the deadly virus by the end of June.
Bangladesh closed its border with India for any kind of movement except that of cargo on April 26 which was later extended till June 14 to control the spread of Coronavirus as the situation in the neighbouring country deteriorated.