Twelve samples were collected from coronavirus suspects in 24 hours until Monday night in the district.
Civil Surgeon Office sources said they have so far collected 47 samples. They have received 22 reports and all of them are negative.
Civil Surgeon Dr Sheikh Abu Shahin said they started collecting samples from March 25.
“We’re collecting samples from suspects if they show symptoms,” he added.
Bangladesh on Monday reported three more deaths and 35 new coronavirus cases. So far, the country has confirmed 123 cases.