California teen girl stabbed to death in school lunchroom by ex-boyfriend: Cops

Cindi Santana, a student at South East High School in South Gate, Calif. -- about 15 miles south of Los Angeles -- was allegedly stabbed by 18-year-old Abraham Lopez, the Los Angeles Times reported.

Lopez, who other students said had dated Santana on and off since the ninth grade, began choking and putting the girl in a headlock while she was having lunch Friday, the Times reported.

A school administrator and high school football player rushed to break up the fight when Lopez pulled out a knife and stabbed them both, the paper reported.

Both the administrator and student, Jorge Garcia, were treated for minor injuries.

Santana, who was stabbed in the side and the back, died during surgery at St. Francis Medical Center Friday night, the Times reported.