Indian opposition leaders march to top court to demand election chief resign

India's opposition parties are set to march to the Supreme Court in Delhi to demand the resignation of the election chief over alleged voter fraud.

This will be the latest in a series of demonstrations in Delhi, with thousands of security forces deployed and roads barricaded in the capital.

Attempts to hold a protest by the Cockroach Janata Party pressure group over the weekend led to thousands of demonstrators being detained.

Opposition parties allege that under Chief Election Commissioner Gyanesh Kumar, India's voter rolls are being manipulated to benefit Prime Minister Narendra Modi's Bharatiya Janata Party (BJP). Both the Election Commission and the BJP have rejected the charge.

The opposition lawmakers want to submit a memorandum to Chief Justice Surya Kant, but he has told reporters he declined the meeting citing "certain reasons".

He did not provide the reasons, but media reports citing the letter have said that he pointed out that some of the issues the opposition wanted to raise with him were also pending before the court. The BBC has not seen the letter.

"Every Indian citizen has the right to approach the court, and we will hear their concerns and grant whatever is due under the law," he told reporters.

Congress MP Rahul Gandhi, meanwhile, has called "all opposition parties, civil society groups [and] all those who believe in democracy" to join Monday's march.

Authorities in Delhi have announced heavy restrictions on traffic and on entry and exit at some key metro stations. There is also heavy security deployment in central Delhi and along the route of the march.

Over the past week, top opposition leaders, including Rahul Gandhi, have been briefly detained several times while leading protests in central Delhi.

On Sunday, the CJP - which is not a registered political party - said it would continue protesting until Kumar stepped down.

The CJP, which successfully led a protest over the summer that culminated in India's federal education minister's resignation, had called for a march on Saturday to Jantar Mantar - the best-known protest site in Delhi where the last set of sit-in demonstrations had also happened.

But authorities in Delhi imposed overarching restrictions that made it almost impossible for protesters to travel and reach Jantar Mantar - trains were cancelled, dozens of metro stations were shut down and tens of thousands of police and paramilitary personnel were on the roads to detain protesters.

The CJP leaders - founder Abhijeet Dipke and co-convenors Saurav Das and Ashutosh Ranka - were dramatically detained from a plane as they landed in Delhi to join the protest.

They were only released a day later - while Dipke has returned home to attend his grandmother's funeral, Das and Ranka held a press conference where they said the protests would continue. Both leaders, however, did not join the protests on Sunday but have said they will seek a new protest date from the police.

Over the weekend, the police detained and released thousands of people, including several journalists. Some videos and photos from the protest show police dragging people, including women, by force and pushing them into buses.

The BBC also captured visuals, external of a policeman slapping a detained protester inside a bus. The Delhi Police did not respond to questions about the use of violence against protesters.

In a statement, Reporters Without Borders condemned the detention of at least 16 Indian journalists.

"Covering events of public interest is not a crime. It is their job. The police's actions against the press are unacceptable," it said.

Congress leader Gandhi said that young Indians who had come to peacefully protest with "love in their hearts, not hatred or anger" had been beaten up.

BJP President Nitin Nabin accused opposition parties and the CJP of trying to destabilise India "at the behest of foreign forces" without elaborating on who the forces were.