Health authorities have detected the cases of Indian variant of coronavirus in seven workers of Ashrayan Project in Nawabganj upazila, Keraniganj.

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 detected with the Indian variant.

Read: IEDCR study of 50 samples finds 40 are Delta

On May 18, the 10 workers came to join Matabpur Ashrayan Project at Nawabganj Keilile union. They all came in a truck along 63 other fellowmen.

As some of them had been suffering from cough, cold and fever, the authorities asked them on May 23 to provide their 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 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), Dhaka where doctors detected seven, out of the 10, infected with Indian variant on June 3.

Read: 8 Indian variant cases identified in Jashore

Now all the infected patients are 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.

Read: Covid patient infected with Indian variant held in Chandpur

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.