LA police were shocked to discover a stockpile of more than 1,000 weapons when they raided a dead man's home.

It was a "staggering number of guns," said LAPD Commander Andrew Smith, reports the LA Times, with police also finding more than two tons of ammunition in the raid.

"Our truck couldn't carry it all," Smith said. "We had to go back and make another trip."

Many of the weapons had never been fired and were still in boxes, wrapped and with price tags attached, police said.

Police made the discovery investigating the death of a man whose decomposing body was found in a nearby car.

The coroner's office said that it was not sure how the man died. Police said they are not treating the case as a homicide.

Smith added that officers were investigating how the man acquired so many guns. He said that there was no indication of any criminal motive, or that the man was planning an attack with the weapons.

Officers are investigating whether any of the guns were used in any crimes.

"We have a lot of work to do," Smith said. "Running the background, history and legality of these weapons is going to require a tremendous amount of time.

"It's not a crime to have a large number of weapons so long as they were legal to own and legally obtained. We want to make sure that's the case."