NEWTOWN, Conn. (AP) — A man killed his mother at their home and then opened fire Friday inside an elementary school, massacring 26 people, including 20 children, as youngsters cowered in fear to the sound of gunshots reverberating through the building and screams echoing over the intercom.

The 20-year-old killer, carrying at least two handguns, committed suicide at the school, bringing the death toll to 28, authorities said.