PARK TOWNSHIP, Mich. (WOOD) — A Holland woman killed in an explosion at a private fireworks show in Park Township Monday night died of a shrapnel wound, deputies say.

An autopsy found that 41-year-old Jana Daniels, who was a spectator at the show, died of cardiac laceration because of a shrapnel injury, according to the Ottawa County Sheriff’s Office.

The shrapnel came from a “device that people were using to launch fireworks,” according to Captain Jake Sparks with the sheriff’s office. Pieces of metal from the explosion flew into the air and struck people attending the Fourth of July party.

The sheriff’s office said Daniels’ death was ruled accidental, saying the firework-launching device likely failed. Deputies do not believe it was meant to explode.

“I don’t believe this was anything intentionally set. I don’t think anybody created this device to try to cause harm or to try explode, it was an accidental explosion that occurred while someone was trying to set off a firework,” said Sparks.

Of the nine others who were hurt in the explosion, the sheriff’s office said at least five were treated and released from local hospitals, while the others continue to receive care but are expected to survive.

It was a “very chaotic, hectic scene,” when first responders arrived to the home on Main Street, just north of Lake Macatawa around 11:10 p.m. Monday, Sparks said. There were about 40 to 50 people in attendance.

At least three homes and five vehicles were damaged in the explosion, deputies said. Sparks said various pieces of shrapnel, “as small as a pea and as large as your fist” went flying from the explosion. The debris field spanned several houses in each direction and hit houses on both sides of the road.

“This shrapnel, these pieces of debris went into homes. I mean, it was so powerful that it went through walls. It went through windows,” Sparks said. “The people wouldn’t have had to be very close to have gotten struck by it because it went such a large debris field.”

No one inside their homes was struck, Sparks believes.

The Ottawa County Sheriff’s Office is still investigating, looking at evidence and interviewing witnesses. Once the investigation is complete, it will be turned over to the prosecutor’s office to determine if criminal charges will be filed.

The federal Bureau of Alcohol, Tobacco, Firearms and Explosives is assisting Ottawa County in the investigation, public information officer Tracy Morris said Wednesday.

Anyone with information is asked to call the Ottawa County Sheriff’s Office at 616.738.4000 or Silent Observer at 877.887.4536..