The fireworks cartons were marked “Made in China." The police chief said they were bought out of state in order to sell them in the neighborhood for use on the Fourth of July.
Moore said three box trucks and a 53-foot trailer were brought in to load up the fireworks and move them to a safe location. However, “improvised explosives" also were found that were too dangerous to move, the chief said.
He described them as 40 home-made devices the size of Coca-Cola cans with simple fuses and 200 smaller but similar devices.
The material was taken to a “total containment vehicle,” Moore said. The multi-ton semi-tractor trailer rig has a spherical iron chamber that is designed to safely detonate explosives.
Moore said less than 10 pounds of material was placed in the chamber, far less than its safety rating.
“This vessel should have been able to dispose of that material,” he said but instead there was a “total, catastrophic failure of that containment vehicle."
As a safety measure, police had knocked on doors before the blast to evacuate homes on both sides of the street where the truck was parked. But firefighters later found people in some of the homes, Terrazas said.