Photos: Cache of more than 1000 guns seized from Los Angeles mansion – The Boston Globe

Although many appeared to be modern, some were 50 years old or more and a few may have been collectibles dating back to the Civil War, KABC-TV reported.

‘‘I had never seen so many weapons in my career of 31 years,’’ police Lt. Chris Ramirez said. ‘‘That’s such a big arsenal in a residence like this, in this type of neighborhood. It’s astounding.’’

One man was arrested at the scene on suspicion of violating a state law that outlaws the manufacture, possession or sale of assault weapons and high-caliber rifles. His name wasn’t immediately released.

Investigators didn’t immediately release other details, such as whether the guns were part of a private collection or to whom some may have been sold.

But the Bureau of Alcohol, Tobacco, Firearms and Explosives said there was no danger to the public.

In a statement, the ATF said authorities received an anonymous tip about a person ‘‘conducting illegal firearms transaction outside the scope of the federal firearm license’’ that the person possessed.