MADISON, Wisconsin — A teenager shot and killed a fellow student and a teacher and wounded six other people at a small private Christian school on Monday, leaving a community reeling as another act of violence struck America.

Police say the girl also wounded six others in the shooting at Abundant Life Christian School, including two students who were in critical condition.

The police in Wisconsin are working to establish a motive for the attack, which left a student and teacher dead and six others injured.