The weapons used in Friday‚Äôs shooting at Sandy Hook Elementary School in Newtown, Conn., were legally purchased and registered to Nancy Lanza, the mother of the gunman, Adam Lanza, two law enforcement officials told NBC News.  

The gunman was clad in black and used two 9mm pistols to kill 20 small children and six adults at the school. It was unclear how many shots were fired there. 

Two 9mm handguns were recovered from the scene, an official told NBCNewYork.com, and a rifle was found in the back of a car parked outside the school.