Officers say a young child raised the alarm after running 400 metres to flag down passersby following the alleged attack.
A man has been arrested after a woman died at a home in the NSW Hunter Valley last night.
Rhukaya Lake, 39, was found dead by police in a home in Kearsley, about 155 kilometres north of Sydney, about 7.30pm yesterday.
Officers say a young child raised the alarm after running 400 metres to flag down passersby following the alleged attack.
READ MORE: Man's new Tesla struck by suspected meteorite on remote Aussie highway
Passers-by stopped and called police.
"It was a traumatic incident as you can imagine, quite horrific," Superintendent Steve Laksa said.
Police say a gun was fired at the property.
Earlier today, police made a plea for public assistance to find Christopher James McLoughney, 37, who is believed to be Lake's partner.
"Police believe this person may have crucial information in relation to the offence that was committed there last night," Laksa said.
A 37-year-old man was arrested this evening after police were informed he had been seen in Bellbird.
Police seized a sawn-off shotgun and ammunition allegedly found when the vehicle he was in was searched.
A Black Hyundai Tucson has also been seized.
McLoughney and Lake had been in a relationship since June this year, Laksa said.
He had lived at the home for years looking after his elderly grandparents, who own the Kearsley property, until they went into care.
Neighbours say Lake had only moved in recently and mostly kept to herself.
The victim is the 58th woman alleged to have been killed in a domestic violence attack in Australia this year.
National Sexual Assault, Domestic Family Violence Counselling Service 1800RESPECT (1800 737 732).
Help is available from the Men's Referral Service on 1300 766 491.
DOWNLOAD THE 9NEWS APP: Stay across all the latest in breaking news, sport, politics and the weather via our news app and get notifications sent straight to your smartphone. Available on the Apple App Store and Google Play.

