The June 30 explosion – which damaged dozens of homes, businesses and vehicles – also resulted in the dismissal of five members of the department’s demining team, according to Chief Michel Moore.
Moore, citing preliminary findings from an investigation into the blast, said bomb squad technicians overloaded a containment chamber above security clearance.
Despite the mistake, authorities are still trying to determine if the chamber – which is designed to contain explosions – was faulty.
The planned detonation of the homemade fireworks came after authorities confiscated more than 5,000 pounds of illegal commercial-grade fireworks from a Los Angeles home.
The commercial-grade fireworks exploded off the site, but officers, believing the homemade fireworks were too unstable to be transported, chose to set them off inside the ward’s containment chamber.
The LAPD and FBI are reviewing explosive detonation protocols, and the police department is requiring a captain to approve future detonations.
Those injured by the blast included nine LAPD officers, seven civilians and one officer from the Bureau of Alcohol, Tobacco, Firearms and Explosives.
A policeman was taken to hospital and is now recovering at home.
Some victims have already filed complaints against the city.
With post wires