Kunal said the 6,420 deaths with symptoms of Covid-19 were collected from Bhojpur, Patna (Rural), Rohtas, Siwan, Darbhanga, West Champaran, Arwal, Kaimur and Aurangabad.
The CPI-ML teams’ findings estimate the Covid death figures to be around 1 lakh.
RJD leader Tejashwi Yadav accused the Nitish Kumar government of hiding data on deaths and presenting unbelievable figures on vaccination.
The Centre also said that states have been advised repeatedly through multiple mediums and through deployment of Central teams for recording of deaths.
Around a dozen of corpses were spotted in the Ganga river in Bihar's Buxar on Monday.
On April 30, Mukesh sent an ambulance to transport the bodies of a retired armyman and his wife that were lying in a morgue of Danapur for two days as their only son was also battling with the virus.
Around 600 healthcare professionals, including doctors and paramedic staff, have tested positive out of whom 14 have died.