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Investigators: Connecticut Shooter Wanted To Outdo Norwegian Killer

The motive for the murders at Sandy Hook Elementary School in Newtown, Connecticut may have been to try to kill more people than a Norwegian man murdered a year and a half ago.

In July 2011, Anders Breivik killed 77 people - 8 in a bombing near the government center in Oslo, 69 others - mostly teenagers - at a camp on a nearby island.

Two officials who were briefed by Connecticut investigators told CBS News that Adam Lanza was obsessed with Breivik and was trying to top the Oslo shooter's body count.

On Dec. 14, Lanza used one weapon to kill his mother and then headed to the school with three other weapons where he took the lives of 20 children and six adults.

Investigators say Lanza attacked the Sandy Hook school because it was an easy target with a large number of potential victims.

Officials have not revealed details about what led them to connect 20-year old Lanza to Breivik.