Chris Brown 'believes close friends were responsible for ransacking his house and holding singer's terrified aunt hostage while he performed at Hollywood club.

His house was broken into less than one week ago.

But, as the days unfold, new developments continue to emerge for singer Chris Brown, who's property was ransacked while he was busy making an appearance at a Los Angeles nightclub.

Now, according to a report on TMZ, the 26 year-old believes the perpetrators were four of his best friends who committed the ultimate betrayal for financial gain, including holding his aunt hostage.

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Claims: New reports suggest that Chris Brown believes the perpetrators were four of his best friends who committed the ultimate betrayal for financial gain, including holding his aunt hostage

The site claims that both law enforcement and the smash-hit performer assume that the burglars were very close to the star. 

As investigations continue, police also believe that a club promoter was involved - not least because they knew he'd been paid $50,000 in cash for an appearance, which was hidden in his safe.

TMZ also add that police believe local gang Bloods may be involved and that 'a member of LAPD's Gang Unit was assigned the case.'

Unaware: At the club, Chris got up to sing before he found out his home had been invaded. Police also believe that a club promoter was involved - not least because they knew he'd been paid $50,000 in cash

Tailed?  Law enforcement sources claim Chris Brown was tailed -  meaning he was actively monitored by a criminal gang who waited until he was busy with a public appearance before striking

The latest update comes just days after claims Chris was tailed ahead of the incident - meaning he was actively monitored by the criminals who waited until he was busy with a public appearance before striking.  

The masked men are said to have forced their way into his 26-year-old singer's Los Angeles home at 2am on Wednesday 15 July, before holding his aunt hostage and then ransacking the place for valuables. 

Officer Liliana Preciado told the media: 'The suspects got away with an unknown amount of cash, electronics and personal items.' 

Shocking: Chris Brown's aunt was allegedly locked in a closet and held at gunpoint by three intruders while the unknowing rapper partied in a nearby club

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Closet connoisseur: Chris showed off his massive walk-in closet (thought to be the same one) at his new home in the San Fernando valley on Instagram on Thursday

Brown's mother, Joyce Hawkins, believes the incident was an inside job, according to TMZ.  

Sources told the site she has been warning him for years about people she calls 'no good-ass friends'. Hours after the home invasion ... Joyce tweeted, 'Watch who you standing beside.'

Detectives have been canvassing the neighbourhood around the gated property at the end of a secluded street in the San Fernando Valley and looking for surveillance camera footage.

'We're trying to see if there's any video evidence that might have picked up the suspects,' Lt. Kirk Kelley told reporters at the scene.

Police presence: On Wednesday morning, police cruisers and officers conducted an investigation at Chris house

Secure: High walls and barbed-wire fence around the property made it appear difficult for someone to have broken in

Investigators have not released descriptions of the suspects, who were armed with handguns and wore bandanas around their faces, police said.

Brown came to the home several hours later to check on his aunt and then left, Preciado said. Thankfully she was not hurt.

TMZ also reports law enforcement sources believe the whoever planned the break-in was someone Chris knew, who was privy to the singer having been paid $50,000 in cash for a club appearance. 

MailOnline has contacted a spokesperson for Chris Brown for further comment. 

High attention: Reporters were also at the scene of the crime, although Chris was not seen

The incident was thought to have occured as Chris flaunted his sculpted abs and extensive collection of tattoos as he left the Argyle club in Hollywood.

Rihanna's ex, was seen leaving the venue in a red varsity jacket that he wore open to reveal his naked torso and chest.

The Don't Judge Me singer looked calm and relaxed as he left the Hollywood hotspot in a body-bearing ensemble. 

Wearing a red varsity jacket with a 'B' for Brown - emblazoned upon it open and unzipped, Chris flaunted his abdominal muscles and ever-growing collection of tattoos. 

Thorough: Several plain-clothes detectives were spotted outside of the house

Gathering evidence: A woman with an investigation kit exited the house - security cameras on the walls behind her might have caught evidence of the intruders

Teaming his top with a pair of black, baggy trousers the singer opted for comfort with a hint of streetwear style.

Rounding his outfit of with a red and white pair of sneakers and an array of gold necklaces, Chris cut a striking and unique figure as he headed home. 

This is not the first time the singer has been the victim of a home invasion, in May, Chris returned home to find a naked woman inside his home.