A 13-year-old boy is among three people who have been arrested after a woman was fatally stabbed in Rushden, Northamptonshire.
The boy and a 27-year-old man are being held on suspicion of murder.
A second 27-year-old man has been arrested on suspicion of attempted murder following the attack at 8.30pm last night.
The victim stabbed near St George's Way. She died at the scene.
Detective Inspector Pete Long, said: "This was an extremely tragic incident in which a young woman has lost her life and I want to reassure people that we are doing all we can to bring those responsible to justice."
He added: "This incident has really shocked the Rushden community, many of whom were on the scene last night, and I would ask anyone who was there and saw what happened to please come forward with your information."
He also appealed for any dashcam footage taken of the area at the time.
Police patrols of the area, including Wellingborough Road, are in place.
:: Anyone with information can contact Northamptonshire Police on 101 or Crimestoppers, in confidence, on 0800 555111