Los Angeles, California Police responded to residential property after receiving a tip of a large cache of illegal fireworks. Police removed between 3,000 and 5,000 pounds of fireworks from the house using three box trucks and a 53-foot trailer.
In the cache, officers found 40 items described as 'explosive devices' along with '200 similarly made smaller devices'. The total weight of the explosive devices was reported as 10 pounds. Due to concerns that the explosive devices were unstable, the bomb squad brought in a truck mounted containment vessel designed to sustain a blast from 15 pounds of explosives. However, when the items were detonated in the truck, resulting blast ripped the truck apart and flipped over nearby parked cars.
At least 17 people - 10 law enforcement personnel and seven residents were injured as a result of the blast. LAPD Chief Michel R. Moore told reporters at a news conference - "Now this is a semi-truck, multi-ton, commercial-grade transport that, within it, has an iron chamber that is meant for this, where they house explosive material that can be safely detonated." He added: "This vessel should have been able to safely dispose of that material."