3-Year-Old Boy Dies After Honolulu New Year’s Fireworks Explosion, Increasing Death Toll to 4

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

A toddler is the latest person to die following the New Year’s fireworks explosion in Hawaii, bringing the death toll up to four.

Cassius Ramos-Benigno, 3, succumbed to his injuries from the explosion on Monday, Jan. 6, according to local ABC affiliate KITV and the Associated Press.

He is the fourth person to die after the explosion in the Aliamanu neighborhood of Honolulu on Wednesday, Dec. 31.

Dr. Jim Ireland, director of the Honolulu Emergency Service Department, said first responders “did everything they could for that boy” after the explosion, according to Hawaii Public Radio.

"But we still have this outcome,” Ireland continued, “and it just makes it that much more tragic, and it's tough. We do see tragedies, and we do see things that are very, very sad, but not to this scale, and so many people are critically ill. And when you have children involved, it just makes it that much worse."

Related: Family Cautions About Fireworks Safety After Tenn. Man Dies in Explosion at Backyard Gathering

PEOPLE previously confirmed that two sisters, 58-year-old Nelie Ibarra and 23-year-old Jennifer Van, were among those who died.

The third victim has been identified by a family member on GoFundMe as “auntie Lita.”

Six people were transported to a burn unit in Arizona on Saturday, Jan. 4, according to the AP. 

Dr. Kevin Foster, the director of the Arizona Burn Center, said at a news conference that the people being treated were all in their 20s or 30s.

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At a separate news conference, Ireland said the fatal fireworks incident was “one of the worst” he ever responded to due to “the immense tragedy and amount of patients and severity of the injuries.”

Honolulu Mayor Rick Blangiardi also previously stated, “We are angry, frustrated, and deeply saddened at this unnecessary suffering and loss of life.”

Hawaii Gov. Josh Green previously described the explosive used as a “cake bomb” — a term for a homemade explosive device.

At a press conference on Thursday, Jan. 2, Green described the scene as a "war zone," adding, "People had traumatic injuries so badly that brain material was across the sidewalk from the ferocity of the explosion."