At around 10.25pm, emergency services were called after he was attacked by two men in Greenview Street, Shawlands.
Thirty-year-old Mr Hassan was taken by ambulance to the Queen Elizabeth University Hospital, where he died a short time later.
Following his death, officers launched a murder inquiry and are working to ascertain the circumstances of what happened. The investigation team have been carrying out enquiries in the local area and studying a large amount of CCTV footage to gather more information.
Although officers believe that Owen was the intended victim, they are still working to establish the motive for his murder.
Detective Chief Inspector Martin Fergus, of the Major Investigation Team, said: “Owen had dinner with a friend at Oro restaurant in Kilmarnock Road, Shawlands and left at 5.30pm on Wednesday 7th November. I am keen to hear from people who were in this restaurant on the afternoon in question, or who may have seen Owen in the Kilmarnock Road area.”
“Around 10.20pm he arrived at the Old Stag Inn, Greenview Street, which is owned by his mother. He left a short time later and was approached by two men. He ran off and was chased and attacked by the two men in Greenview Street.
“Owen managed to make his way back to the pub where his Mum and other patrons tried to help him, and emergency services were called.
Detective Chief Inspector Fergus continued: “We need to trace the two men who are responsible for the sustained and vicious attack on Owen as a matter of urgency. It is vital that they are held to account for their actions. Owen’s family and friends have been left devastated by this terrible crime.
“We need to establish where Owen went after 5.30pm and who he was with. If you have any information on this please come forward.
“We were contacted on Wednesday afternoon anonymously by someone who passed on information.
“I would urge that person to re-contact us as they may have further detail that will help move our investigation forward.
“We will trace whoever is responsible for this murder, but we would appreciate any information that the local community can provide and I would urge anyone who saw Owen, or who was in the area of Greenview Street on Wednesday evening to contact us. Did you see the two men responsible in the area before or after Owen was attacked? You may think your information is irrelevant, but please let us be the judge of that, as the piece of information that you hold could prove vital to this investigation.”
Anyone with information should contact the inquiry team through 101 quoting reference number 4167 of 7th November 2018. Alternatively Crimestoppers can be contacted on 0800 555 111, where anonymity can be maintained.