Half A Million People Gather To Oust PM Modi

India's opposition parties drew half a million supporters to Kolkata's streets for the largest show of force yet against Prime Minister Narendra Modi as a national election looms.

Police in the eastern city said more than 500,000 people turned out for the massive "Unite India" rally, which saw leaders from across the opposition spectrum rail against Modi and his ruling Hindu Nationalist Party.

Speeches were beamed on 20 giant screens to a sea of spectators waving the national tricolour flag and the banners of India's myriad opposition movements. Police said 5,000 officers were on standby for security.

The Bharatiya Janata Party leader Narendra Modi, who won a landslide victory in 2014, is seeking another term, but he faces rising discontentment over unemployment and economic inequality.