She said she was told that at least one person was shot but was expected to survive. The Spokane Sheriff's Office is expected to provide more information at a news conference sometime on Wednesday afternoon.
The shooting was reported at Freeman High School in Rockford on Wednesday.
Stephanie Lutje told The Associated Press that she was relieved to hear her son was safe after his high school near Freeman was put on lockdown.
Multiple ambulances and a Lifeflight helicopter were dispatched to a high school south of Spokane, Washington, following reports of a shooting.
PBS NewsHour will update this story as it develops.