The incident happened shortly before 9 a.m. Tuesday at a home on the 1800 block of West 9th Street in Pomona. Police said the suspect, identified as Nicholas Campos of Pomona, attacked 58-year-old Penny Pacheco with his fists, inflicting serious injuries to her face. The second victim, 60-year-old Gary Warthen, tried to intervene, but police say Campos stabbed him in the neck.
Both victims were airlifted to a hospital. There was no word on their conditions or their exact relationship to the suspect. Police described the incident as family-related but did not elaborate.
The suspect tried to get away but was taken into custody after being spotted nearby. The motive remains unknown.
The incident remains under investigation.
City News Service contributed to this report.