A Hispanic teenager fatally stabbed his ex-girlfriend at school in a brutal attack after punching the girl and pushing her to the ground

Abraham Lopez, 18, stabbed Cindi Santana, 17, at South East High School in South Gate, California, and she died hours later, police said. Lopez was arguing with her during a lunch break - and later caused a hospital bomb scare by saying that he had hidden explosive devices. He stabbed her several times before being subdued by a school official, policeman and a student, who all suffered minor injuries, authorities said. Los Angeles Unified School District police chief Steve Zipperman said that a school dean tried to intervene and realized Lopez had a knife.