Chapainawabganj, one of the worst-hit frontier districts in Rajshahi division, has seen a sudden rise in the Covid-19 mortality rate.
In the past 24 hours, four persons have succumbed to coronavirus, officials said on Saturday.
During the period, as many as 32 people have tested positive for Covid-19.
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The coronavirus positivity rate in the district currently stands at 11.26%.
A total of 3,076 people have been found infected with the virus in the district to date.
Also, 66 people have so far died of Covid-19 in the district. To date, 1,800 people have recovered.
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Some 55 Covid-19 patients are currently undergoing treatment at the Corona unit of the Sadar hospital.
After the end of a 14-day strict lockdown in Chapainawabganj, the local administration imposed restrictions on public movement to break the chain of Covid-19 transmission on June 8.
The new restrictions will remain in force till June 16.