Poway, CA – The investigation into an explosion at a research and development test facility on Wednesday, June 10 that injured 4 has yielded information that the cause of the explosion was apparently mechanical.
Three of the company’s employees suffered scratches in the blast, while a fourth broke an ankle. The explosion shook the western part of the Poway Business Park, buckled doors, opened a hole in the roof, and sent workers in nearby buildings running outside in fear.
Poway City Manger Dan Singer said the 13,994 square-foot building, home to four separate businesses, has been declared structurally unsound. He said that metal inside the cement walls has been compromised and engineers are trying to devise temporary measures to secure the walls.
The exact cause of the explosion is not yet known, but is linked to a kinetic energy device that was being tested six feet below ground, but was not covered.
Investigators with the Poway’s sheriff department’s Bomb and Arson unit are wrapping up their investigation – partly by reviewing video of the blast – and expect to hand the case to the state’s Occupational Health & Safety Administration soon having determined that it was indeed only an accident and that no foul play was involved.