Police in Delhi closed six metro stations and deployed thousands of security personnel on Monday as opposition parties sought to march on the supreme court over changes to India's electoral rolls.
The protest continues a month of almost daily demonstrations by opposition parties and supporters of the 'cockroach' youth movement, who are demanding the resignation of chief election commissioner Gyanesh Kumar. Critics say the revision, which began last year, benefits prime minister Narendra Modi's Bharatiya Janata party (BJP).
The Election Commission's verification exercise removed more than 130 million names from voter lists, a figure larger than the population of Japan. Of those, 30 million people could not be traced, 28 million had died and 63 million had relocated.
Opposition parties allege Muslim voters and other minorities, who are unlikely to support the Hindu nationalist ruling party, were disproportionately affected by the deletions. Both the poll panel and the BJP reject the charges.
Over the weekend, police detained thousands of protesters in Delhi, including leaders of the Cockroach Janta party, as thousands of security personnel locked down central Delhi.
The Election Commission denies favouring any party and says wrongly deleted voters can re-enrol. The BJP has accused its rivals of trying to undermine the country's democracy by questioning legitimate electoral processes.