Five people have been charged with murder in connection with a deadly fireworks warehouse explosion in Northern California that killed seven people and injured two others, authorities announced Friday.

Yolo County Deputy District Attorney Clara Nabity said the charges stem from a grand jury indictment. Among those charged is a former Yolo County Sheriff lieutenant. A total of seven people have been arrested in connection with the July 1 explosion.

The blast occurred at a 5,000-square-foot fireworks warehouse near Esparto, a small farming community about an hour from Sacramento. The explosion sparked a massive fire and was so powerful that it blew open doors of nearby homes. Resident Nisa Gutierrez told a local television station that she and her daughter were nearly knocked over by the blast wave while in their yard, causing their animals to scatter.

The explosion had immediate consequences for regional Fourth of July celebrations. Officials in nearby Sutter and Yuba counties announced they would need to find alternatives for their Independence Day festivities after their fireworks were destroyed in the blast. Local celebrations in the area were also cancelled that year.

The incident occurred on July 1, just days before the Fourth of July holiday when fireworks demand typically peaks. Authorities have not released details about what caused the explosion or the specific circumstances that led to the murder charges against the five individuals.