Mother Lynda Connors, 55, found dead in home in Sydney's south on Monday

Her eldest son, aged 31, found her lying in bed covered in blood at 6.45am

Police have arrested her other son Nathan, 28, over the suspected homicide

Officers found a crossbow in the back of his car and seized a pitchfork

Family friend claimed Mr White had changed after being struck with a pool cue

A man has been arrested after his 55-year-old mother was found dead with extensive injuries to her body in a townhouse in Sydney's south on Monday morning.

Lynda Connors was found by her eldest son, 31, lying in bed covered in blood at 6.45am in their family home on Florida Street, Sylvania. It's believed he found her lifeless and wrapped in a blanket with severe head injuries.

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A few hours later his younger brother Nathan White, 28, was pulled over and dramatically arrested in St Peters, in the city's inner west. He was taken to Newtown Police Station for questioning over his mother's suspected murder.

Police are investigating the possibility she was killed with a crossbow or pitch fork which were both found in the back of Mr White's car and seized for examination.

A close family friend also claimed Mr White had been struck over the head with a pool cue at a local pub roughly five years ago and hadn't been the same since.

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Police have charged Nathan White, 28, over the murder of his mother Lynda Connors, 55. Pictured are for forensics experts examining her home in Sylvania, in Sydney's south

Mr White (pictured) was arrested by police a few hours after his mother was discovered dead

Ms Connors was found by her eldest son, 31, lying in her bed covered in blood just before 7am

A woman who said she had known Mr White since he was a child told the Sydney Morning Herald that he had recently started hearing voices.

'Over the past 12 months he had just fully isolated himself,' she told the publication.

'Before that he was fine, he had normal conversations and everything.

'He had always been a pretty good kid growing up. He has had a hard life, he only had his mum. It was only mum and the two boys.'

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Miranda commander Superintendent Michael O'Toole said police were appealing for witnesses that may have seen something suspicious on Sunday night.

'The (older son) is very disturbed by what has happened. He is the one who came across the incident and called police to attend it,' he said.

A police source said Mr White had taken his mother's car and their pet dog (pictured) before he was pulled over by police on the Princes Highway in St Peters, in the city's inner west

It's believed Ms Connors eldest son found her wrapped in a blanket with severe head injuries. Police are pictured outside the house early on in the morning before Mr White's arrest

He confirmed a crossbow had been found but would not be drawn on whether it had any connection to Ms Connors' death.

'There was a crossbow taken out of the vehicle, but there are other items (that have) also been taken out of the vehicle that the older son was in,' he said.

He refused to rule out the possibility she may died on Mother's Day, saying it was too early in the investigation to determine an exact timeline of events.

Ms Connors' death is being treated as suspicious by police.

A police source told the Daily Telegraph that Mr White had taken his mother's car and their pet dog before he was pulled over by police on the Princes Highway.

Police are investigating the possibility Ms Connors was killed with a crossbow, which was found in the back of Mr White's car, or a pitchfork, which has been seized

Police are treating Ms Connors' death as suspicious and have set up a crime scene

Police taped off the townhouse complex on Florida Street, in the Sydney suburb of Sylvania

Neighbours claim Ms Connors and her two adult children had lived at the home for 20 years

Homicide detectives and local police officers canvassed the neighbourhood after the death

Superintendent O'Toole said Ms Connors eldest son was not in custody but was at Miranda Police Station assisting police with their inquiries.

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A neighbour told Daily Mail Australia she didn't hear the disturbance next door and was woken by police.

The neighbour said the mother lived there with her two sons – and had done for 'about 20 years'.

NSW Homicide Squad detectives have taped off the townhouse complex and are speaking to family and friends of Ms Connors.

Police have refused to rule out whether Ms Connors died on Mother's Day or early on Monday