The orthopaedic department of Barishal Sher-e-Bangla Medical College Hospital (SBMCH) has been put under lockdown after 11 doctors and nurses tested positive for coronavirus.
Other doctors and staff of the department have been sent on isolation.
The hospital authorities yesterday said two coronavirus patients came for treatment there, concealing their condition and they were admitted to the department.
"They hid the fact that they tested positive for Covid-19 and underwent treatment for several days," said surgeon Sudip Halder of the department.
"After learning about the truth of their condition, samples of all doctors and nurses from the department were sent for tests and 11 of them tested positive," Halder said, adding that they have locked down the department.
Those two patients were sent to the coronavirus ward of the hospital.
Thirty-five people died with coronavirus infections in the last 24 hours in the country, taking the death toll to 846, Directorate General of Health Services said yesterday.