After receiving a call about a shooting just before 8 a.m. local time, police found the bodies of two 15-year-old female students outside the school who were killed by single gunshot wounds, Glendale Police Department spokeswoman Tracey Breeden said in a news conference.
Breeden did not confirm whether the deaths were suicides, saying there is "absolutely no way to make a determination" this early in the investigation. She said a weapon was found beside the sophomore students' bodies, which were in a covered patio area outside the high school.
She also could not confirm the relationship between the two students.
Responding police quickly realized the situation did not involve an active shooter, but the school remained on lockdown until police could confirm the scene was safe.
Breeden said there are no persons of interest, and they don't believe there are any suspects or witnesses to the deaths.
Arizona Gov. Doug Ducey commended law enforcement and school staff for their fast response in a statement.
“As details of this morning’s tragic shooting continue to be released, our hearts remain with the students, educators and families of Independence High School and the entire Glendale community," he said.