15-year-old girls were killed at Independence high school in GlendalePolice say incident was ‘isolated’ and are not searching for suspectsTwo teenage girls died in a shooting at a high school in Glendale, Arizona, Friday morning in an incident that police say was “isolated”.The girls, both 15 years old, were shot once at Independence High School, Glendale officer Tracey Breeden told reporters at a news conference, according to the Associated Press.