A man has been stabbed "for his shopping" on his way to his car in a busy car park.
The horror attack is understood to have happened outside an Aldi just before 4.30pm.
The 62-year-old victim is said to have been inside the supermarket prior to the incident.
He has now been rushed to hospital.
Police have taped off the scene at Salford Precinct in Greater Manchester.
Officers say they believe the incident, in Heywood Way, was an isolated one.
Greater Manchester Police launched a manhunt for the attacker, though no arrests have been made at this stage.
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One shop worker, who asked to remain anonymous, told the Manchester Evening News: "We saw everyone running out of the precinct. I saw an old man at the side of his car. He had been stabbed.
"They tried to take his shopping off him as he made his way to his car. He was taken to the hospital.
"His car is still there outside the Aldi now. The whole area has been cordoned off. The shopping centre and everywhere else has had to close.
"Aldi has been completely blocked off. There are police cars at every entrance of the precinct and the car park. I saw the man slumped in his car.
"His neighbour was with him and she said he had been stabbed for his shopping. I think he was just in Aldi. It's just horrible. It is very scary when it happens on your door step."
GMP said in a statement it was called to the scene at around 4.25pm to reports of a stabbing.
"Officers attended the scene, and a 62-year-old man was taken to hospital with serious injuries," they continued.
"Upon conducting initial enquiries, this incident is believed to be an isolated incident.
"Officers will remain at the scene to conduct further enquiries."
GMP is appealing to the public for further information regarding this incident to help locate the suspect.
Detective Sergeant Gareth Bannister of GMP’s Salford District said: "I would like to reassure the public first and foremost that this is an isolated incident, and our officers are leaving no stone unturned to locate the suspect in question.
"Our officers will remain in the local area to conduct further enquiries this evening and we have an increased number of patrolling officers across the centre of Salford to provide further reassurance to our community.
"If you were at Salford Precinct this afternoon, saw anything suspicious, saw the suspect in question or have any information no matter how small it may be, this could be a huge help in locating the suspect and achieving justice for the victim."
If you have any information regarding this incident, you can report it by calling 0161 856 5235 or 101 quoting log 2025 of 10/01/2023. You can also report information online via our reporting tool on our website: www.gmp.police.uk
Always call 999 in an emergency. Alternatively, you can report information anonymously to the independent charity Crimestoppers on 0800 555 111.
