Police say they are treating the killing of MP Sir David Amess as a terrorist incident
There is a potential link to Islamist extremism, and counter-terrorism officers are searching two addresses in the London area
The Conservative MP was stabbed multiple times in the attack in Leigh-on-Sea, Essex, on Friday
Boris Johnson and the Labour leader Sir Keir Starmer have laid flowers at the scene
Home Secretary Priti Patel says Sir David was killed doing a job he loved
Ms Patel, who also has an Essex constituency, calls Sir David a "dear and loyal friend"
A 25-year-old British man is being held in police custody on suspicion of murder
Government sources tell the BBC he is a UK national who, from initial inquiries, appears to be of Somali heritage
We are bringing our live updates on the killing of Essex MP Sir David Amess to a close for the evening.
The page was written by George Bowden, Jennifer Meierhans, Katy Lewis, Kate Whannel and Mariam Issimdar.
It was edited by Alex Kleiderman, Emma Atkinson and Owen Amos.
Image source, PA MediaThe mood in Leigh-on-Sea tonight is sombre as people express their sadness and bewilderment at the fatal stabbing of their MP.
Sir David Amess's constituents speak warmly of a man who dedicated his life to serving them.
Prime Minister Boris Johnson calls Sir David one of the "kindest, nicest, most gentle people in politics".
And deputy PM Dominic Rabb says he was "a formidable campaigner with a big heart, and tremendous generosity of spirit - including towards those he disagreed with".
A fixture in the House of Commons chamber for nearly 40 years he was known as one of Parliament's characters: fun, friendly, unconventional and outspoken.
Image source, Getty ImagesHere's what we know so far about the investigation into the fatal stabbing of Essex MP Sir David Amess.
We've got more detail on what we know about the investigation so far here.
Image source, James WoodcockLord Walney, independent adviser to the government on political violence and disruption, says he can imagine a discreet police presence at constituency events would be an attractive option for many MPs.
The former Labour MP told BBC Radio 4's PM programme: “It is not simply the awful tragic violent act that took the life of David Amess and my friend Jo Cox.
"It is also that sense of intimidation, if that prevents people coming into parliament in future, and puts pressure on people to act differently or step down that in itself is a huge attack on our democracy and it’s something that we must be concerned about and take serious steps to address.”
Asked if he will make any recommendations for security measures to ensure MPs physical safety, Walney says he thinks we will see the Speaker of the House of Commons stepping up the levels of security.
A Labour MP has expressed caution over the idea that constituency surgeries should be observed by police officers for protection, following the death of Sir David.
Diane Abbott, who served as Shadow Home Secretary under Jeremy Corbyn, says it could risk putting people off from visiting their local MP.
Speaking to Caroline Wyatt on BBC Radio 4 PM, she says: "I’ve been talking to colleagues - there was one in North London who was telling me that because of death threats she had a police officer outside her advice session - and a police car in fact. Well of course the number of people coming to see her dropped right down.
"You don’t want to have a set-up which is so off putting to ordinary people that just want help. So I wouldn’t support airport-style screening.
“I would prefer, going forward, to meet constituents behind a screen, as we have now for Covid and so on - that might be quite complicated to arrange but at least you know someone’s not going to just lean over the desk and stab you, which could happen now.”
People in Southend came together this afternoon at the town's Civic Centre to hold a vigil and reflect on the life of the MP David Amess and light candles.
Image source, Reuters
Image source, Reuters
Image source, Reuters
Image source, ReutersAs tributes continue to pour in for Essex MP Sir David Amess let's take stock of what's happened since he was killed while meeting constituents in Leigh-on-Sea yesterday.
Labour MP Naz Shah says there is "no right or wrong answer" over whether or not MPs should continue holding their surgeries.
The Bradford West MP - who has received death threats in the past - says the attack on Sir David "could have happened to any of us".
"I just think you've got to respect every MP - some will have the 'Yes, we're going to carry on' view, and some people won't feel comfortable."
The West Papua independence leader Benny Wenda has sent, external his condolences to the family of Sir David Amess.
He says he was one of the first MPs to sign the Westminster Declaration for West Papua and would "always be fondly remembered by West Papuans".
The Westminster Declaration calls for an internationally supervised vote on independence from Indonesia for West Papua and has been signed by parliamentarians around the world.
Southend United hold a one minute silence ahead of their FA Cup match.
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Image source, ReutersThe killing of MP Sir David Amess has highlighted a security dilemma for politicians across the globe.
Some of the BBC's international correspondents explain what the situation is like in other countries.
BBC South American correspondent Katy Watson says being an open, accessible people's representative in the major cities of Brazil - Sao Paolo and Rio de Janeiro - where wealth and inequalities are polarised, politicians are more likely to be flanked by bodyguards.
Brazil is deeply divided politically and President Jair Bolsonaro was stabbed during his leadership campaign.
Being an MP in India - the world's largest democracy - comes with a lot of privileges, a security detail is one of them, writes Vikas Pandey in Delhi.
In recent years, attacks on politicians have taken the form of ink-throwing and slapping.
But a number of politicians, including former PMs Indira Gandhi and Rajiv Gandhi, have lost their lives in violent attacks.
In the Netherlands, Dutch lawmakers do not hold surgeries and only a select few Dutch politicians, including the anti-Islam leader, Geert Wilders, have protection.
The prime minister, Mark Rutte, pictured below, has been seen cycling to meetings.
Read the full story on the struggle politicians face to meet the public and stay safe.
Image source, Getty Images
People have come together at Southend Civic Centre for a moment of reflection on Sir David's life.
Mohammed Shamsuddin says he had known Sir David since 1983 and describes him as "English gentleman who was so kind to our community as well as the whole of Southend".
Ruhul Shamsuddin, Joint Secretary of Essex Jamme Masjid says he had known Sir David since he was a child. He says: "For his life to be cut short is devastating."
Mahmudul Hasan says: "We greatly miss him and he will be always missed."
Image source, EPAClaire Calder from the Dogs Trust says Sir David Amess was "one of the biggest champions of animal welfare in Parliament".
She praises the MP's "huge sense of humour" and "huge heart".
Recently, she says he had joined their campaigns to tackle puppy smuggling and to ban electric shock collars.
Next week is the annual Westminster dog of the year contest run by the Dogs Trust and the Kennel Club.
Sir David had been planning to enter his French bulldog into the contest.
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The fuel poverty charity National Energy Action describes Sir David as "a true public servant".
The charity said the MP would be remembered for his bill aimed at eliminating fuel poverty - the Warm Homes and Energy Conservation Bill.
The bill required the government to publish and implement a strategy to reduce fuel poverty and became law in 2000.
A spokesperson for the NEA said Sir David's family could "take some small comfort from knowing the huge positive difference he has made".
"Millions of people across the UK are now better supported through national policies and programmes than before he started his campaign and he has directly helped millions of people to be warmer and safer in their homes."
Image source, PALondon Mayor Sadiq Khan says his thoughts are with Sir David Amess' family at "this time of unimaginable grief".
He describes the Essex MP as "a brilliant, kind, dedicated public servant, widely liked and respected across the political divide".
He adds: "I’m utterly disgusted by this attack on our democracy.
“Like with the murder of my dear friend Jo Cox five years ago, it appears that the horrific killing of Sir David Amess was another attempt to divide us, to fuel fear and to change how we treat one another."
"Our response must be to stand united in defiance and stay true to our values and way of life."
We've been reporting that some MPs are holding their usual surgeries in their constituencies following the death of Sir David Amess.
Among them is Craig Williams, MP for Montgomeryshire, who met voters alongside his Conservative colleague from the Welsh Parliament, Russell George.
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Kieran Mullan, the Tory MP for Crewe and Nantwich, tweeted:, external "Surgery today, we must not let people force us to do things differently. David would not have wanted that."
Dominic Casciani
Home Affairs Correspondent
There's no indication that the national terrorism threat level is going to be changed to a higher level in light of the attack.
The threat level is currently "substantial" which is in the middle of the five tiers.
It means the Joint Terrorism Analysis Centre, which is part of MI5, thinks that an attack is "likely".
It's been at that level since February.
The two levels above it are typically triggered when there are ongoing concerns among counter terrorism leaders of an emerging plot or remaining questions about an incident that's already taken place.
Members of Southend-On-Sea’s Muslim communities are paying tribute to Sir David Amess as a community leader, friend and mentor.
A joint statement from all the mosques in the town says: "He shared in our happiness, by attending our weddings and functions and he was there for us in our times of need. We will all miss him dearly, but his legacy of public service will live on, as will memories of his warmth, selflessness and kindness."
It says: "Sir David’s murder was an indefensible atrocity, commited on the grounds of a place of worship and we condemn it in the strongest possible terms.This act was committed in the name of blind hatred, and we look forward to the perpetrator being brought to justice."
Ruhul Shamsuddin, joint secretary of Essex Jamme Masjid remembers Sir David as "a tremendous force for good" and "a truly wonderful man".
"It’s an honour to say I’ve known him my whole life. I’ve lost not just a community leader, but a family friend and mentor.”
Image source, Getty ImagesPresident of Ireland, Michael D Higgins, has sent his condolences to Sir David's family.
He said he was killed while carrying out a fundamental role of a politician - helping their constituents.
He offered his "deepest sympathies to the family, friends, colleagues in Parliament and constituents" of Sir David.
He also extended thoughts to the family of the late Jo Cox MP, murdered just over five years ago in her constituency of Batley and Spen.
"On behalf of the Irish people, I send them our deepest sympathies."
The British-Irish Parliamentary Assembly, external (BIPA) has cancelled a scheduled plenary meeting at Westminster on Monday as a mark of respect for Sir David.
Image source, GettyThe British Committee for Iran Freedom (BCFIF) has issued a statement condemning the "vicious attack, which was an assault not only on Sir David, but also on democracy in the UK".
Sir David was a champion of human rights and democracy in Iran for more than three decades. He consistently spoke in support of the Iranian people’s democratic aspirations and the Iranian Resistance movement, NCRI, the BCFIF, external said.
"One of the proudest things I have ever done in my political career is to support the National Council of Resistance of Iran which calls for the Iranian regime to be replaced with a safer and more democratic government," Sir David said on 6 September.
In an email to the BBC, supporter Jahed Madumi wrote: "With great sorrow I heard about Sir David Amess' loss.
"As an Iranian I have to say that he was a great friend of our nation, and he always defended the freedom for the people of Iran."
Mr Amess is seen above with the British delegation during the Conference In Support Of Freedom and Democracy In Iran in Paris in 2018.