A retired law enforcement officer opened fire at a popular biker bar in Orange County, California Wednesday night in a shooting that left 5 people dead and six others wounded, according to reports.

The gunman was among the dead, shot by deputies who responded to the carnage at Cook’s Corner, a Lake Forest restaurant on Santiago Canyon Road in Trabuco Canyon, according to CBS News.

The shooting began as a domestic dispute between the shooter and his wife, sources told the news outlet.

Orange County deputies confirmed that “multiple victims” were struck by gunfire” at the establishment and said the incident is still under an active investigation.

This is a developing story. Check back for updates.