Homicide detectives are investigating after a woman's body was found at a home in NSW. Photo: Steven Saphore/AAP PHOTOS

A man, possibly armed, is on the run following the discovery of a woman's body by police during a domestic violence call-out.

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Emergency services were called to a home in Kearsley, in the NSW Hunter Valley, about 7.30pm on Friday.

Officers found the 39-year-old woman, who is yet to be formally identified, dead at the residence.

Homicide investigators immediately established a crime scene.

Hunter Valley Superintendent Steve Laksa said police were seeking 37-year-o

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