[Updated at 6:30 p.m. ET]
NEWTOWN, Conn. - The shooter who stormed Sandy Hook Elementary was carrying enough ammunition to kill scores of more people beyond the 26 lives he claimed at the school, police said Sunday afternoon.
Adam Lanza, 20, was armed with a military-style rifle and two semi-automatic pistols. Investigators said he possessed "multiple high-capacity magazines" for all three weapons.
Police haven't revealed how many bullets Lanza fired during his 10-minute shooting spree, but admit he still had many more live rounds with him when he took his own life as first responders closed in.
"Hundreds of bullets, yes," said Lt. J. Paul Vance, a spokesman for the Connecticut State Police.
The 26 victims were all shot multiple times with the rifle. Lanza, however, used one of the handguns to shoot himself in the head. His death was officially ruled a suicide, the Connecticut state medical examiner announced Sunday afternoon.
The death of his mother, 52-year-old Nancy Lanza, was a homicide. The medical examiner said she was shot in the head multiple times at the family's home.
Police believe Lanza killed his mother then drove her car about two miles to Sandy Hook Elementary where he shot his way through the school's locked doors. Twenty first-graders and six adult school employees, including the principal, lost their lives.
Investigators say they have recovered lots of promising evidence from the Lanza home, but have not revealed what motivated the massacre.
The names and ages of those killed at the school:
Charlotte Bacon, 6
Daniel Barden, 7
Rachel DaVino, 29
Olivia Engel, 6
Josephine Gay, 7
Ana M. Marquez-Greene, 6
Dylan Hockley, 6
Dawn Hochsprung, 47
Madeleine F. Hsu, 6
Catherine V. Hubbard, 6
Chase Kowalski, 7
Jesse Lewis, 6
James Mattioli, 6
Grace McDonnell, 7
Anne Marie Murphy, 52
Emilie Parker, 6
Jack Pinto, 6
Noah Pozner, 6
Caroline Previdi, 6
Jessica Rekos, 6
Avielle Richman, 6
Lauren Russeau, 30
Mary Sherlach, 56
Victoria Soto, 27
Benjamin Wheeler, 6
Allison N. Wyatt, 6