Police have identified the woman and two children found stabbed to death in a Jersey City apartment in a domestic violence incident uncovered by the building’s superintendent.

Luis Turcos told The New York Post that he heard a commotion in the basement apartment and went to investigate, but found Napoleon Romero-Anduray, 31, with a knife.

“He went crazy and killed the two children and the mother,” Turcos said.

Police arrived on the scene and found Luisa Urbano, 31; Juan Martin Urbano, 9; and Diana Ramirez, 5, dead from stab wounds. Romero-Anduray had also stabbed himself, the Daily Voice said, citing Hudson County Prosecutor Esther Suarez.

Suarez said the woman was pronounced dead at the scene while the children died at Jersey City Medical Center.

Romero-Anduray has been charged with three counts of murder and a weapons offense.