Erica Ortiz, 36, was on her way to the St. Francis Head Start School on St. Francis Street around 7 a.m..
Police said the attacker stabbed her in the neck. She was taken to University Hospital and pronounced dead at 8:01 a.m.
Estol "Hector" Molina, 42, of Newark has been arrested for the murder. Molina is the victims ex-boyfriend according to police.
Ortiz had a restraining order against him, authorities said.
Ortiz had filed numerous domestic violence complaints against him.
Bail has been set at $1 million.