It was from the woman's son, made from a pay phone not far from his mother's home in Central West NSW.

He allegedly told the triple 0 operator that he had just killed someone.

Now that 28-year-old is being questioned by police over the alleged murder of his mother in the early hours of Friday morning.

Fairfax Media has been told the 28-year-old allegedly pointed police to a crime scene at Underwood Street in Forbes just after 6am on Friday.

By the time officers arrived, the woman was already dead.

Her son was arrested at nearby Union Street and taken to Forbes police station, where he remained throughout the day.

As of Friday afternoon, no charges had been laid.

Tributes for the woman poured onto social media, with Forbes locals remembering the victim as a "caring and loving lady".

"I am in shock what an awful thing and what a beautiful, kind, caring soul she was," Angela Crowley wrote on Facebook.

"I will always remember her kind face and so down to earth,"

Another woman wrote: "this world is so cruel you will be missed...rest easy you wonderful ladie (sic)."

It is the third alleged murder of a woman in NSW this week.

Sabrina Bremer's badly burned body was found on a roadside near Tweed Heads in far north NSW on Thursday morning. She had been reported missing in Queensland a day earlier.

On Wednesday morning, a 39-year-old woman was found dead in a home in Greenacre, in Sydney's south-west.

A man was later charged with assault-related offences.

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