SWAT officers fire tear gas in standoff with armed man in LA mansion

 A Los Angeles home where police used tear gas during a standoff with an armed man, on Thursday, Aug. 10, 2017.

CBS Los Angeles

LOS ANGELES — SWAT officers have fired tear gas into a sprawling Los Angeles home where a man is holed up after firing several rounds at the woman who lives there following an argument. 

Police Captain Brian Wendling says the woman managed to escape unharmed when the man arrived at the 9,000-square-foot house early Thursday and eventually began shooting. 

Four neighboring homes have been evacuated, CBS Los Angeles reports.

Wendling says the incident began as a fight between the man and woman, who are in an on-again-off-again relationship. The woman told police she got into an argument with her boyfriend, who had been drinking heavily. The boyfriend, who is in his 50s, apparently used one of the many weapons the homeowner's mother keeps and began firing shots inside the home. 

Officials say it's been difficult to locate him because the house in the Pacific Palisades area is so large.