A political row has erupted in India over allegations of "vote theft" by opposition parties, and accusations of electoral irregularities against the country's election body, which they say favoured the ruling Bharatiya Janata Party (BJP) in the 2024 general elections.

India's opposition accuses the Election Commission of India of rushing through a mammoth electoral roll revision in the eastern state of Bihar, saying the exercise could render vast numbers of citizens unable to vote.

Scores of Indian opposition lawmakers -- including Akhilesh Yadav, Derek O’Brien and Rahul Gandhi, Prime Minister Narendra Modi’s main rival -- are detained after police block their march to the Election Commission headquarters in New Delhi.