NEW DELHI (Reuters) -Opposition leader Rahul Gandhi said on Wednesday India's electoral system suffers from "serious discrepancies" and he pledged to continue challenging its integrity through public mobilisation and potentially the courts.

Amid a ‘vote chori’ row, the BJP claims Sonia Gandhi was added to the electoral rolls before acquiring Indian citizenship, while the Congress defends her, attributing the registration to the Election Commission's actions.

Dozens of Indian opposition leaders were detained in New Delhi on Monday as they shouted slogans, jumped barricades and marched to the Election Commission in a rare public protest against what they say are electoral malpractices.