UPDATED, Tues 11.45am:  A man has been charged with murder and has faced court.

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UPDATED, 2.36pm Monday: Police have confirmed the death of a woman in Tomewin is being treated as a murder.

Tweed Byron Police crime manager Detective Inspector Brendon Cullen said a number of people were assisting police with their investigations.

Insp Cullen said a member of the public came forward on Saturday to inform police of the deceased woman.

"We attended a property at Tomewin, where we located a deceased female," Insp Cullen said.

"We then implemented a crime scene at that site."

Insp Cullen said the Tomewin Rd home, where the woman was found, remained a crime scene as investigations continue.

He said it's believed the person who notified police - and those assisting with the investigation - were residents of the house where the woman was found.

Insp Cullen said the time and cause of death were yet to be determined, with a post-mortem being undertaken today.

INITIAL report, 10.20am Monday: A crime scene was established north of Murwillumbah at the weekend after a woman's body was discovered inside a home.

Tweed police attended the scene at Tomewin about 2pm Saturday, acting on a tip-off.

It's believed the woman was aged in her 50s.

Tweed-Byron LAC officers have begun investigations into the circumstances surrounding the woman's death.

It's understood a number of people are assisting police with their inquiries.

More information to come.

Anyone with information about this matter should contact Crime Stoppers on 1800 333 000 or at police.nsw.gov.au.