British opposition politician Jo Cox shot, stabbed
Ms Cox, 41, who is from the opposition Labour Party, was attacked as she prepared to hold a routine meeting with constituents.
Police later said in a statement they had responded to "an incident" on Market Street, Birstall — where the attack on Ms Cox was reported to have happened — and a woman in her 40s had suffered "serious injuries and is in a critical condition".
"A man in his late 40s to early 50s nearby also suffered slight injuries," the statement said.
"Armed officers attended and a 52-year-old man was arrested in the area. There are no further details at present.
"Police presence in the area has been increased as a reassurance to the community."
TV footage showed the surrounding area had been sealed off and BBC radio reported Ms Cox had been taken by air ambulance to a Leeds hospital, which is under police guard.
British Prime Minister David Cameron has tweeted: "Very concerned about reports Jo Cox has been injured. Our thoughts and prayers are with Jo and her family."
British opposition Labour leader Jeremy Corbyn said he was "shocked".
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