A 41-year-old British woman MP from the opposition Labour Party on Thursday succumbed to her injuries after being reportedly shot and stabbed in her constituency in northern England, a week before the crucial referendum on UK's EU membership.
Labour MP Jo Cox was holding a meeting with constituents, in her local constituency when an altercation reportedly led to the attack.
Cox was rushed to Leeds General Infirmary, where armed police stood guard while medical experts tried to save her life inside.
A West Yorkshire Police spokesperson said: "We are sad to confirm that Jo Cox died from the injuries she sustained in the attack today. We urge any eyewitnesses who were in the area to come forward and help us with our inquiries to establish factually what exactly happened."
West Yorkshire Police confirmed a 52-year-old man has been arrested. Weapons, including a firearm, have been seized from the man.
The arrested man has been locally named as Tommy Mair but there is no confirmation on the motive or the exact nature of the attack, with some local witnesses describing hearing gun-shots while others saying it was a stabbing incident.
The local community is to hold a vigil in Cox's memory at the local church in Birstall.
She is survived by her husband and two children and was due to celebrate her 42nd birthday next Wednesday and had been spoken of as a future minister for the Labour party due to her reputation as a strong politician and plain speaker.
As a sign of respect, both sides campaigning for next Thursday's European Union (EU) Britain Stronger in Europe and Vote Leave announced they would suspend their campaign for today.