In an open letter to Mamata Banerjee, Sinha alleged the coronavirus situation in the state is "getting worse every day".
"Why is there a difference between the number of infected/deaths given by Centre and the state government? Why is the government hiding information on this?" Sinha wrote.
He claimed that the BJP was being prevented from providing relief material to the affected though the ruling Trinamool Congress (TMC) was doing it in some places.
"Despite repeated warnings from the Union Home Ministry, why is the state government passive? How many people have entered the state after attending Nizamuddin's religious meeting, and what action has been taken to identify them?
The BJP leader said that these are the questions "any ordinary people of West Bengal wants to know today".
( With inputs from ANI )