A Newark mother repeatedly stabbed her young son outside the high-rise apartment building where they lived, then apparently used the same knife to kill herself, prosecutors said.
But it is not clear what caused the tragedy that played out over the weekend.
Acting Essex County Prosecutor Carolyn Murray said the 8-year-old boy was found late Saturday night outside the New Community Commons building. He was taken to a hospital, where he remained in critical condition Monday.
Murray said the body of Othelia Johnson, 26, was found late Sunday morning on a nearby street. An autopsy determined that Johnson died from stab wounds to the heart and left lung.
Authorities said the investigation is ongoing, but it appears Johnson's wounds were self-inflicted.
The child's name was not released due to his age.
Officials say a New Jersey man has died from injuries he suffered in a chain-reaction crash inside one of the tubes of the Lincoln Tunnel. Port Authority of New York and New Jersey police spokesman Joe Pentangelo says the 49-year-old Summit resident was among three people hurt in the accident.