London: Jo Cox, a British member of parliament who campaigned for the country to stay in the EU and more aid for Syrian refugees, was killed in a brutal street attack on Thursday.
Weapons, including a firearm, were recovered from the scene of the incident in northern England and the sole suspect, a 52-year-old man, is being held by police.
Campaigning for the June 23 referendum was suspended on Thursday and Friday out of respect.
This is what we know so far.
Who Was Jo Cox?
The 41-year-old was elected last year as an opposition Labour party MP for Batley and Spen, a constituency in West Yorkshire, northern England, where she grew up.
After graduating from the University of Cambridge, she helped set up a pressure group, Britain in Europe, and spent two years working in Brussels.
She was policy chief for aid agency Oxfam and worked with the wife of then Labour prime minister Gordon Brown in tackling maternal and infant mortality.
In parliament she was a prominent campaigner for refugee rights, co-chairing a parliamentary group on Syria with a Conservative MP, and spoke out in favour of immigration in a powerful first speech in the House of Commons.
What Happened?
The attack took place in Birstall, a large village in Cox's constituency just a few miles (kilometres) from where she was born, outside her regular constituency advice surgery in a local library.
Police said they were called at 12:53 pm. Her meeting was scheduled for 1:00pm, according to her website.
They said she was "attacked by a man who inflicted serious, sadly ultimately fatal, injuries". She was pronounced dead at 1:48pm by a member of the paramedic crew.
Eye witnesses cited by British media said she had been shot two or three times before being stabbed repeatedly by a man who subsequently walked away.
There were reports that he shouted "Britain first" or "put Britain first", although this is disputed.
There was a further attack on a 77-year-old nearby who sustained injuries that were not life threatening.
"Shortly afterwards, a man was arrested nearby by uniform police officers. Weapons including a firearm have also been recovered," police said.
Who Has Been Arrested?
British media named the suspect as Thomas Mair, whom two neighbours described as a "loner" who helped local people with their gardens.
His brother Scott told reporters that he had a history of mental health problems, while there were also indications that Mair had extreme views.
The Southern Poverty Law Center, a US advocacy group, said it had records showing Mair had bought copious reading material from the National Alliance, a neo-Nazi organisation.
The Daily Telegraph newspaper reported that Mair was a subscriber to S. A. Patriot, a South African magazine published by the pro-apartheid group the White Rhino Club.
Who Else Has Reacted?
Conservative Prime Minister David Cameron said: "We've lost a great star. She was a great, campaigning MP with huge compassion, with a big heart.
Labour leader Jeremy Corbyn said his party and the country were in "shock and grief", adding: "We have lost a much-loved colleague, a real talent and a dedicated campaigner for social justice and peace."
US Secretary of State John Kerry expressed his "deep sorrow" for Cox's death, adding: "It is an assault on everybody who cares about and has faith in democracy."
Weapons, including a firearm, were recovered from the scene of the incident in northern England and the sole suspect, a 52-year-old man, is being held by police.
Campaigning for the June 23 referendum was suspended on Thursday and Friday out of respect.
Who Was Jo Cox?
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After graduating from the University of Cambridge, she helped set up a pressure group, Britain in Europe, and spent two years working in Brussels.
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In parliament she was a prominent campaigner for refugee rights, co-chairing a parliamentary group on Syria with a Conservative MP, and spoke out in favour of immigration in a powerful first speech in the House of Commons.
What Happened?
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Police said they were called at 12:53 pm. Her meeting was scheduled for 1:00pm, according to her website.
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Eye witnesses cited by British media said she had been shot two or three times before being stabbed repeatedly by a man who subsequently walked away.
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There was a further attack on a 77-year-old nearby who sustained injuries that were not life threatening.
"Shortly afterwards, a man was arrested nearby by uniform police officers. Weapons including a firearm have also been recovered," police said.
Who Has Been Arrested?
British media named the suspect as Thomas Mair, whom two neighbours described as a "loner" who helped local people with their gardens.
His brother Scott told reporters that he had a history of mental health problems, while there were also indications that Mair had extreme views.
The Southern Poverty Law Center, a US advocacy group, said it had records showing Mair had bought copious reading material from the National Alliance, a neo-Nazi organisation.
The Daily Telegraph newspaper reported that Mair was a subscriber to S. A. Patriot, a South African magazine published by the pro-apartheid group the White Rhino Club.
Labour leader Jeremy Corbyn (C) stands amongst colleagues as he attends a vigil to slain Labour MP Jo Cox in Parliament square in London on June 16, 2016. (AFP Photo)
Conservative Prime Minister David Cameron said: "We've lost a great star. She was a great, campaigning MP with huge compassion, with a big heart.
Labour leader Jeremy Corbyn said his party and the country were in "shock and grief", adding: "We have lost a much-loved colleague, a real talent and a dedicated campaigner for social justice and peace."
US Secretary of State John Kerry expressed his "deep sorrow" for Cox's death, adding: "It is an assault on everybody who cares about and has faith in democracy."
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