And that concludes our live coverage of Sunday's march in Paris in support of unity and the victims of last week's attacks, in which 17 people were killed. The French interior ministry has said it was the biggest demonstration in French history.

President Francois Hollande was joined by 40 world leaders who linked arms at the start of the marches. He said Paris was the capital of the world for the day.

There were also rallies in other French cities, across Europe, and around the world, from Beirut to Montreal.

You can follow further updates, as well as background material on the story, on the BBC News website.

"The (French) Jewish community is in need of reassurance... Each new tragedy has the Jewish community more and more worried," Jack-Ivey Bohbot told BFMTV.

tweets, external: London's Tower Bridge lit up with the French flag colours tonight.

tweets, external: 1/2 Muslim woman in Marseilles tells me: "I am against this terrorist attack but I have also the right to have my free speech

2/2 "...and say that I am not Charlie. I am a Muslim citizen of France."

tweets:, external Loving the spirit of unity right now at The Grand Synagogue in France! #JesuisCharlie".

Israeli Prime Minister Benjamin Netanyahu and French Prime Minister Manuel Valls are also at the Grand Synagogue of Paris, taking part in a remembrance ceremony along with President Francois Hollande.

What are the roots of the battle for freedom of speech? Historian Tom Holland, who tweeted out one of Charlie Hebdo cartoons in the wake of Wednesday's attack, explains the ramifications.

German ministers have accused the anti-immigration movement Pegida of exploiting the Paris attacks.

German Justice Minister Heiko Maas has urged Pegida to call off its next march, scheduled for Monday in the eastern city of Dresden. Last week, 18,000 people turned out for the rally.

"If the organisers had a shred of decency, they would simply cancel these demonstrations," the Bild newspaper quoted him as saying in its issue to be published Monday.

"The victims (of the Paris attacks) do not deserve to be abused by rabble-rousers like these," he said.

President Francois Hollande is taking part in a remembrance ceremony at the Grand Synagogue of Paris for the victims of the past days' shootings.

The urge is to come back onto the streets and to reclaim the land.

That is what it has felt like through the extraordinary scenes of Sunday.

People have made the comparison with the Liberation demos in 1944, and it is apt.

It is apt not just in terms of numbers, but also in how at that moment, too, French men and women were putting down a marker: France is ours.

Image source, AP

In the Canadian city of Montreal, about 25,000 rallied in support of the Paris attack victims.

The Montreal Canadiens hockey team paid their own tribute by playing the French national anthem, the Marseillaise, before their game on Saturday against the Pittsburgh Penguins.

has strongly criticised , externalthe participationof leaders of countries where freedom of expression is restricted.

In a statement, it says it is "appalled by the presence of leaders from countries where journalists and bloggers are systematically persecuted such as Egypt (which is ranked 159th out of 180 countries in RWB's press freedom index), Russia (148th), Turkey (154th) and United Arab Emirates (118th)."

Reporters Without Borders secretary-general Christophe Deloire said, "We must not let predators of press freedom spit on the graves of Charlie Hebdo."

Kato Zlato

tweets:, external Four hours of walking and standing in a crowd, we finally made it...to the place where the rally started at 15h #UnityRally

emails from Place de la Republique: What has marked me most is to see black, white and Arab people, adults and children, on the Republique statue. Tricolores linked with the Turkish flag, and this right beside the Kurdish flag of those who still seek answers about the women activists killed in this quarter of Paris. I turn round and I see two orthodox Jews, rarely seen in this quarter. It's not about flags or badges of identity but this particular moment still spoke volumes about what France is and what France feels right now.

Lydia Vassallo, marching in Paris, tells the BBC: "We cannot sit at home and do nothing. I've been here since 2pm and plan to stay until the end.

"I am here because I don't believe that people who are doing their job should get killed in the way that they did and to support France and the people living here.

"I hope this rally will bring hope to people and comfort to the families of the those killed and show the world we need to stay united against this crime."

emails: It feels as if all of Paris is in the streets. We are still 1km away from Place de la Republique but the street is full of people. It is important the whole of society unites together now in solidarity for the freedom of speech and against hatred that wants to divide us.

Tighter controls on internet use are likely in the wake of the attacks. European, US and Canadian foreign ministers met ahead of the rally and issued a joint statement.

They say it is essential for major internet providers to co-operate with governments and, if asked, remove online content "that aims to incite hatred and terror".

They also want greater monitoring of the EU's external borders, and are calling for changes to rules on freedom of movement to share information and carry out checks on passengers.

tweets, external: @BBC_HaveYourSay It's a refreshing change to see the humanity, unity and love at the march in Paris. Je suis Charlie.

tweets from central London:, external CharlieHebdo memorial in Trafalgar square #JeSuisCharlie #JeSuisAhmed

Image source, Twitter

Image source, Getty Images

This is the scene on the Boulevard Voltaire as darkness begins to fall on Paris: thousands are making their way to the end point of the demonstration, in the Place de la Nation.