NAUGATUCK — Police have released video footage of the detonation of commercial, commercial-grade fireworks during the town’s annual fireworks display.

The incident remains under investigation by the Naugatuck Fire Marshal’s Office along with the Connecticut State Police Fire and Explosive Investigation Unit, with the support of Naugatuck police.

Police said the fireworks were detonated during Naugatuck’s annual fireworks show on Breens Field on July 2 around 9:40 p.m.

“While the facts and circumstances that resulted in the detonation remain under investigation, a video depicting the detonation is being released to the public,” police said.

Police posted the video on YouTube.

“The fireworks involved in this incident were commercial-grade, are classified as explosives, and treated as such,” police said. “The video highlights the dangers that fireworks can pose when used by members of the public. Explosives are inherently dangerous and the fact that there was minimal damage and no reported injuries can be attributed to the adherence to strict safety measures enforced by fire officials.”

The police department said illegal fireworks are the source of multiple complaints and “decrease the quality of life of our community.”

Any devices that fly or explode, including firecrackers, skyrockets, bottle rockets, roman candles and any firework with an explosive or flammable compound, are illegal in Connecticut.

Possession of illegal fireworks could lead to infractions or an arrest.

While those are illegal, sparklers and fountains — the latter of which produces sparks when lit — are not considered fireworks and are legal in the state. These devices cannot be sold or used by anyone under the age of 16.

Anyone with information about the incident is asked to call Naugatuck police confidential tips line at 203-720-1010.