The Election Commission of India has released new draft electoral rolls for Bihar ahead of state polls in November.
The Special Intensive Revision (SIR), carried out from 25 June to 26 July, cut the number of registered voters from 78.9 million to 72.4 million.
Officials say the removals include deceased individuals, duplicate entries, and people who moved away.
Opposition parties and election rights groups claim the process was rushed and has led to incorrect photos, duplicate records, and names of dead people remaining.
They also allege many genuine voters, particularly in certain border districts, were removed.
The Commission denies political bias, saying field officers visited every voter, though it has not released details of those removed.
Local reports from villages near Patna found residents unaware of the revision or unable to confirm visits by officials.
Some who checked their entries found photos mismatched with names, relatives listed twice, or deceased family members still included.
Critics argue the short timeline and documentation requirements have made it hard for poor and migrant communities to prove eligibility.
The issue has sparked protests in Parliament and is now under review by the Supreme Court.
The ruling JD(U)-BJP alliance supports the revision, saying it cleans the rolls, while the opposition RJD calls it a politically motivated move that could affect upcoming elections.