The death toll in an explosion that rocked a northern New Jersey home in November has risen to four.

Officials investigate the inside of a house explosion, Wednesday, Nov. 11, 2015, in Elizabeth, N.J. Officials say the explosion was caused by gas. The blast leveled the two-family duplex. (AP Photo/Julio Cortez) reports that 11-year-old Tyquan Henderson died Tuesday, three weeks after the death of his 36-year-old sister, Tavasha Henderson.

Both siblings were hurt in the Nov. 11 blast at a multifamily home in Elizabeth where they lived. Officials have said the ground floor of the three-story home was illegally converted into a living unit with gas and electric, and that the explosion was caused by gas.

No charges have been filed in the blast, but authorities say the investigation is ongoing.

Another sibling hurt in the explosion, 26-year-old Kimayha Henderson, died Dec. 3. Another resident, 24-year-old Femi Brown, 24, was pronounced dead at the scene the day the blast occurred.

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