Governor: Texas gunman said he was going to shoot up school

  • Flowers and candles are placed outside Robb Elementary School on Wednesday in Uvalde, Texas, to honor the victims killed in Tuesday's shooting at the school. (JAE C. HONG/Associated Press)
    Flowers and candles are placed outside Robb Elementary School on Wednesday in Uvalde, Texas, to honor the victims killed in Tuesday's shooting at the school. (JAE C. HONG/Associated Press)

    UVALDE, Texas — The gunman who massacred 19 children and two teachers at an elementary school in Texas warned in online messages sent minutes before the attack that he had shot his grandmother and was…