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 New Year's Eve fireworks explosion in a Honolulu -area neighborhood killed at least three people and critically injured at least 20 others, authorities said. "It looked like a war zone," said Honolulu Fire Chief Sheldon K. Hao.

A three-year-old boy on Monday became the fourth person to die of injuries stemming from a massive explosion of fireworks a Honolulu home on New Year's Eve, police said. The blast also killed three women and injured more than 20 people,