A supermarket in Shipley where a woman killed herself this morning has re-opened.
The woman, said to be aged between 20 and 40, died at Asda shortly after 8.30am.
One female witness said the tragedy happened at the top of the hardware aisle where the woman was found lying in a pool of blood.
"One of the shop's first aiders was trying to give CPR," said the witness, who asked not to be named.
"One of the young men who works there actually saw the woman stabbing herself in the throat. He's in terrible shock.
The shopper said she was told that the woman had taken a knife from a rack in the hardware department, torn it out of the packaging and then stabbed herself.
Emergency services were called to Asda at 8.37am to reports that the woman had suffered a neck wound.
She was later pronounced dead at the scene.
The store was closed this morning as police forensic teams examined the scene.
Police are interviewing staff and witnesses and also studying in-store CCTV.
Detective Inspector Ryan Bragg of Bradford District CID said: "There are not believed to be any suspicious circumstances and no one else is being sought in connection with the incident."
A spokesman for Asda said: "We are aware of an incident in our Shipley store this morning and our thoughts are with the individual’s family at this time. Our priority at this time is looking after our colleagues and supporting the police in their investigation."