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Police were forced to seal off a part of Leeds after two women suffered serious stab wounds.
Neighbours said they saw the women, who are believed to be mother and daughter, come out of a semi-detached house in Garforth this morning (August 2) covered in blood before one dropped to the ground.
West Yorkshire Police said a 55-year-old woman is in a serious but stable condition in hospital following the attack in Bar Lane.
Officers said the second woman, who is 25, suffered less serious injuries which are not thought to be life-threatening.
Officers are wanting to speak to 40-year-old Leslie Cunningham (pictured) who is known to both victims.
He is considered dangerous and members of the public are warned not to approach him and to contact police immediately.
Detective Chief Inspector Dean Henson from West Yorkshire Police said: "This was an extremely violent incident and we urgently need to speak to Leslie Cunningham, who is also commonly known as Jevons or Leslie Jevons.
"I would ask members of the public to take a look at his picture and description and contact us at the first opportunity if they recognise him or have any information of his movements in the Garforth or Leeds area."