Man stabbed in neck in Sydney's west

A man has been stabbed in the neck in Sydney's west.

Emergency services responded to reports of an injured man in a park in Fullagar Road, Wentworthville, shortly before 7pm on Wednesday.

He was taken to Westmead Hospital for treatment of a stab wound to his neck. His condition is not known.

Witnesses reported seeing a male and female run from the area. They have not been found despite an extensive police search.

A crime scene has been established, which will be examined by forensic officers.

Police are appealing for anyone with information to come forward.