Lanza had hundreds of bullets

A six-year-old girl survived the Newtown massacre by pretending she was dead, according to reports.

The girl, who has not been identified, is said to be the only survivor of her class.

The family’s pastor Reverend Jim Solomon told ABC News: “[She] ran out of the school building covered in blood from head to toe, and the first words she said to her mum when she got outside was: 'Mummy, I'm OK, but all of my friends are dead.”

Federal agents said Adam Lanza had fired guns at shooting ranges over the past few years but there was no evidence he did so recently in preparation for the massacre, the Associated Press reports.

A spokeswoman for the Bureau of Alcohol, Tobacco, Firearms and Explosives said the gunman and his mother both fired at shooting ranges and had visited ranges together.

Debora Seifert told AP there was no indication "that the shooter engaged in shooting activities in the past six months."

Lt Paul Vance from Connecticut police said he aims to provide people with "a crystal clear picture" on why Adam Lanza committed his attacks.

Lt Paul Vance from Connecticut state police said they had seized a "significant" amount of evidence from Adam Lanza's home.

He added that there were no previous concerns over Lanza.

Lt Paul Vance from Connecticut state police said they would "maintain security (at Sandy Hook) indefinitely", during a press conference on the massacre.

Connecticut State Police's Lt Paul Vance has confirmed two people survived with gunshot wounds following Friday's massacre at Sandy Hook Elementary School.

"There are two adults that were injured in the facility in the school that suffered gunshot wounds and are recovering," he said.

Connecticut State Police's Lt Paul Vance has said detectives will be looking to speak to anyone who had contact with gunman Adam Lanza at a shooting range prior to Friday's massacre.

"We want to talk to them if we haven't reached them yet," he said.

Connecticut State Police's Lt Paul Vance has said he has "no information" on whether gunman Adam Lanza was carrying his brother's ID during the attacks.

Connecticut State Police's Lt Paul Vance has said law enforcement officials had "no previous concerns" over gunman Adam Lanza before Friday's massacre.

"There was no previous contact or concerns prior to this tragic event," he said.