Police say a 15-year-old gunman at an Oregon high school had an assault rifle, handgun and several magazines of ammunition during the attack.
Police also said Wednesday that an autopsy determined that suspect Jared Michael Padgett died of a self-inflicted gunshot wound in the Tuesday attack.
They say no link has been found between the shooter and the student who was killed. No motive was released.
Police say the shooting occurred in a gym detached from the main school building, with 14-year-old Emilio Hoffman killed in the boys' locker room.
The weapons and ammunition was concealed in a guitar case and duffel bag when the shooter arrived at the campus.
Authorities say the suspect involved in the shooting at an Oregon high school is dead, and that the situation is stabilized.
The Multnomah County sheriff's office said there were reports of shots fired about 8 a.m. Tuesday at Reynolds High School in Troutdale.
Students were evacuated from the school, hands on their heads, to be reunited with their parents in a supermarket parking lot.
Students inside the school were texting with their parents. A parent interviewed on TV said she had heard from her son inside the school that he was OK, but she was worried.
Police told parents to go to a nearby parking lot to meet with their sons and daughters as they evacuated the school.