Seven people have been killed in Delhi in protests against India's controversial new citizenship law, as US President Donald Trump made his first official visit to the country.

A policeman and six civilians have died in the capital's deadliest day since the new law was passed last year.

Vehicles were set alight in the clashes between supporters and opponents of the law which, critics say, targets India's 200 million Muslims.

There are fears of further clashes.

Correspondents say the timing of this incident is an embarrassment to Prime Minister Narendra Modi as he hosts the US president and the violence has taken the spotlight away from Mr Trump's visit.

Where is the violence?

It broke out in three Muslim-majority areas in north-east Delhi on Sunday and continued into Monday.

The violence in the area has seen protesters firmly split along religious lines, BBC reporters who were at the location, said.

Both sides have blamed each other for starting the violence.

The clashes spilled into Monday and police fired tear gas shells and led baton charges to disperse the stone-throwing crowds. TV footage showed flames and smoke billowing from buildings.

Eyewitnesses said they saw charred vehicles and streets full of stones in areas like Jaffrabad and Chand Bagh on Tuesday morning. Some said these areas resembled war zones.

Police were allowing people to enter only after checking their identity cards. Some Metro stations have also been shut.

What are officials doing?

Delhi's freshly re-elected Chief Minister Arvind Kejriwal, called on the federal government to restore law and order.

The capital's police force reports directly to Mr Modi's ruling Bharatiya Janata Party (BJP)-led government.

Home Minister Amit Shah is scheduled to hold a meeting with Mr Kejriwal later today.

The violence has been linked to a BJP leader, Kapil Mishra, who had threatened a group of protesters staging a sit-in against the CAA over the weekend, telling them that they would be forcibly evicted once Donald Trump had left India.

Who are the dead and injured?

Six civilians and one policeman have been killed in the violence so far.

At least 35 people are being treated in Delhi's GTB hospital for serious injuries, medical officials told BBC Hindi.

However, the number of injured is believed to be more than 100.

"One of the seriously injured is a senior police officer. He has now been moved to another hospital for specialised treatment," an official said.

Shahid Alvi, an auto rickshaw driver, died because of a bullet injury he suffered during the protest. His brother Rashid told BBC Hindi that Shahid was married just a month ago.

"He was shot in the stomach during the protest and died while we were taking him to the hospital," he said.