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

Less than 24 hours after police rushed to the scene of the shooting, the suspected gunman is dead, and some of the victims are still injured. Here is what we know about the school shooting.

The Associated Press, CNN and the New York Times reported Monday evening that the shooter was a female student, citing unnamed law enforcement officials. At a press conference earlier in the afternoon, Madison Police Chief Shon Barnes declined to release the student's age or gender.