Police seek answers after children killed in Oregon school shooting

Police in Bend, Oregon, were investigating on Friday why a 16-year-old boy shot dead three children and a teacher at the Silver Rail Elementary School, and how he got hold of the long gun used in his attack.

The latest deadly school shooting in the United States unfolded on Thursday afternoon when the teenager, who has not been publicly identified, shot through a locked door at the school in central Oregon, according to the Bend Police Department....