Thousands have marched through New Delhi demanding the resignation of India’s chief election commissioner over changes to voter lists that opposition parties say favour Prime Minister Narendra Modi’s ruling party.

Rahul Gandhi of the Indian National Congress led Sunday’s protest, the latest in more than a month of demonstrations accusing Chief Election Commissioner Gyanesh Kumar of overseeing a biased revision of electoral rolls.

Opposition leaders say the removal of more than 130 million names disproportionately affected Muslims and other minorities, who are less likely to back Modi’s Hindu nationalist Bharatiya Janata Party (BJP).

The Election Commission has denied favouring any party and says voters whose names were wrongly deleted can re-register.

The BJP has accused the opposition of undermining democracy by challenging legitimate procedures.

India’s next general election is scheduled for 2029.