A local pizza shop owner has been identified as the victim of a fatal stabbing outside of his own business in western Sydney overnight.

Homicide detectives are investigating under Strike Force Narrira after Sonmez Alagoz, 58, was found on the Great Western Highway, near Kingswood, just after 10pm with a single stab wound to his chest near his Pizza Stop store.

Emergency services treated Alagoz at the scene before he was taken to Westmead Hospital, where he died around 12.30am today.

Sonmez Alagoz
Sonmez Alagoz was found on the Great Western Highway, near Kingswood, with a stab wound to the chest. (Nine)

NSW Police Superintendent Trent King told media police arrested six teenagers, four boys and two girls, in the Kingswood area a short time later.

King said the teenagers are in custody and are being questioned over the man’s death.

The six teenagers are known to police.

King said the pizza restaurant owner was well-known in the community and described the incident as a “tragedy”.

A pizza shop owner has died after a stabbing in western Sydney. (Nine)
NSW Police Superintendent Trent King t
NSW Police Superintendent Trent King said the incident was a “tragedy”. (9News)

“It was a confronting scene for emergency responders, he had suffered a gruesome injury and required immediate assistance,” King said.

“This gentleman was very closely connected to this community for a very long time, including owning this business for over 14 years.

“This is an absolute tragedy, there’s no other way of describing it.”

The man’s family have been notified of his death and are “distraught”, King said.

He said the teenagers are cooperating in custody and police have not ruled out any motives so far.

Police could not confirm if a weapon had been found.

“This is a tragedy that we can’t ignore,” King added.

A crime scene was established with detectives from Nepean Police Area Command commencing an investigation with the assistance of the State Crime Command’s Homicide Squad.

Anyone with information, CCTV or dashcam footage of the area is urged to contact St Marys Police or Crime Stoppers on 1800 333 000 or online.
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