1. MYSTERY

    No Motive Known in PA Shooting

    Justin Merriman, Pittsburgh Tribune-Review / AP Photo

    Authorities have not suggested a motive or released any information about the alleged gunman who entered a University of Pittsburgh psychiatric clinic Thursday afternoon armed with two semiautomatic handguns and opened fire. One person was killed and seven people were wounded before campus police shot him dead. Officials said it appears he acted alone. All of the wounded are expected to survive.

    Read it at Associated Press