The six victims are in their 20s and 30s, and all have extensive burns, according to Dr. Kevin Foster, director of the Arizona Burn Center.

A 3-year-old boy died Monday of injuries suffered in a massive fireworks explosion on New Year’s Eve in Salt Lake, according to the Honolulu Police Department. He is the fourth person to die in the incident,

Cassius Ramos-Benigno was among those seriously injured when the explosion occurred in the Aliamanu neighborhood on Wednesday, Dec. 31

The Honolulu medical examiner identified the toddler as Cassius Ramos-Benigno. The cause and manner of death were listed as pending. After the disaster, Hawaii’s leaders intensified their oft-repeated calls to crack down on the state’s vast illegal fireworks trade with stepped-up enforcement and greater penalties.