Chris Brown's $4m mansion surrounded by police after threatened a woman with a gun

Police have surrounded Chris Brown's $4million mansion after responding to reports that he threatened a woman with a gun.

Officers are awaiting a search warrant to enter the property in the Tarzana area outside Los Angeles after Brown failed to respond to repeated requests to open the door.

A spokesman for the LAPD confirmed to dailymail that police were summoned in the early hours of Tuesday morning by a 911 call from a woman requesting assistance.

A large group of friends, including both Brown and Kim Kardashian's infamous ex Ray J, were socialising at the property when another guest arrived with two women, TMZ reports.

While the man was invited, the women were not, sparking a disagreement.

One of the women called 911, alleging Brown had pulled his weapon and pointed it at her during an argument.

 News stations broadcast images of multiple police cars outside Brown's property

 Brown lives at the luxury $4m mansion home in Tarzana, outside Los Angeles

Brown and a group of friends are believed to remain inside the property, but have not responded to officer's attempts to gain access to the home

Brown and a group of friends are believed to remain inside the property but have so far not responded to officer's attempts to gain access to the home.

'We're trying to make contact with the residents here in Tarzana,' an officer told reporters outside the home.

'They've been uncooperative so we're working to obtain a search warrant.'

And he added: 'We need their co-operation in order to deal with this in a peaceful manner.'

The investigation is ongoing and multiple officers and seven police cars can be seen outside the mansion

Ray J - who was getting a tattoo when the disagreement occurred - has since left the property. His BMW was impounded by police as evidence, leaving the younger brother of singer Brandy to take an Uber home, reported TMZ.

The investigation is ongoing and multiple officers and seven police cars can be seen outside the mansion.

Aerial views of the scene also showed what appeared to be a deflated bounce house in the grounds of the property.

Brown, left, and Ray J are seen onstage in 2010 at the BET Awards; the two were socialising at the hip-hop star's mansion when Brown pulled a gun during a row with an uninvited guest

Brown has had a number of run-ins with the law in recent years, beginning with his conviction for assaulting then-girlfriend Rihanna in February 2009.

For that offence, he was sentenced to five years of probation, one year of domestic violence counselling, and six months of community service and his probation was finally lifted in March 2015.

 In 2014, he spent almost three months in jail last year for violating his probation after allegedly hitting a man in Washington, and had his probation revoked in January 2015 following a poor report which claimed he had a 'knack' for finding trouble and had been present at two shootings, though he was not involved in either.

Notes at the time read: 'There is also concern that when he performs or attends at some of his public events, people will get shot or seriously injured.'

Then in June this year the She Ain’t You hitmaker was accused of stamping on a man's head during a club appearance at the Cannes Film Festival.

Brown, seen last week, has had a number of run-ins with the law in recent years, beginning with his conviction for assaulting then-girlfriend Rihanna in February 2009

Brown is the parent of two-year-old daughter Royalty, with former lover Nia Guzman

Meanwhile, the Fine China singer’s former lover Nia Guzman previously claimed he was unfit to care for their child without strict supervision and asked a court to appoint a monitor and reduce the amount of time the star was allowed to spend with the little girl.

However, in May, a judge denied the request and kept the existing arrangement for joint legal and physical custody - which sees Chris care for his two-year-old daughter Royalty 12 days a month - of the youngster in place.