UPDATE: Jo Cox has died. Police announced Thursday evening that the shooting had been fatal.
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Labour MP Jo Cox was shot Thursday afternoon, and is in critical condition in hospital.
The attack, coming in a frenzied period of campaigning from both sides of the EU referendum debate, stopped UK politics in its tracks.
Both campaigns have frozen their activities:
We are suspending all campaigning for the day. Our thoughts are with Jo Cox and her family.
— Open Britain (@Open_Britain) June 16, 2016
Vote Leave are suspending campaigning, following attack on Jo Cox
— Julia Macfarlane (@juliamacfarlane) June 16, 2016
Cox’s husband, Brendan, has not commented publicly on the shooting – but posted a photograph of his wife at a pro-EU event the previous day:
— Brendan Cox (@MrBrendanCox) June 16, 2016
Prime Minister David Cameron, who was due to speak in Gibraltar this evening for the Remain side, is returning to Britain instead:
It's right that all campaigning has been stopped after the terrible attack on Jo Cox. I won't go ahead with tonight's rally in Gibraltar.
— David Cameron (@David_Cameron) June 16, 2016
His Vote Leave rival Boris Johnson, who was on the road in Norwich, also stopped for the day and offered his condolences.
Just heard the absolutely horrific news about the attack on Jo Cox MP. My thoughts are with Jo and her family
— Boris Johnson (@BorisJohnson) June 16, 2016
UKIP leader Nigel Farage, who had earlier unveiled a new poster campaign in Westminster, did the same:
Just heard the absolutely horrific news about the attack on Jo Cox MP. My thoughts are with Jo and her family
— Boris Johnson (@BorisJohnson) June 16, 2016
Labour party leader, who had earlier been speaking for Remain in Sheffield, did likewise.
Utterly shocked by the news of the attack on Jo Cox. The thoughts of the whole Labour Party are with her and her family at this time.
— Jeremy Corbyn MP (@jeremycorbyn) June 16, 2016
Other prominent Labour figures also spoke out:
All our thoughts and prayers are with Jo Cox and her family.
— Hilary Benn (@hilarybennmp) June 16, 2016
Shocking news about @Jo_Cox1 Desperately hoping she pulls through
— Angela Eagle (@angelaeagle) June 16, 2016
We are all thinking of you Brendan. What a terrible time for you and your family. We love you all x https://t.co/F87j0nRZTD
— Lucy Powell MP (@LucyMPowell) June 16, 2016
What is happening to the world? Love & prayers to @Jo_Cox1 & all her family.
— Andy Burnham (@andyburnhammp) June 16, 2016
We are all thinking of you Brendan. What a terrible time for you and your family. We love you all x https://t.co/F87j0nRZTD
— Lucy Powell MP (@LucyMPowell) June 16, 2016
Cox remains in hospital. A 52-year-old man has been arrested.