Discuss as:

Police: Second person injured in Connecticut school shooting survived

Connecticut state police spokesman Lt. Paul Vance provides an update on the investigation of the Sandy Hook Elementary shooting, telling reporters that two adult survivors who suffered gunshot wounds at the school are recovering.

Updated at 1:38 p.m. ET: Police said Monday that two adults were injured but survived the shootings at Sandy Hook Elementary School in Connecticut and will be interviewed as soon as they're well enough to answer questions.

Connecticut State Police Lt. Paul Vance confirmed that a second adult was injured and survived, saying both were wounded in the "lower extremities." Initial reports last week suggested that only one person had been injured and survived.

In the meantime, authorities were interviewing other witnesses and analyzing the evidence found at the school and the shooter's home. Among the physical evidence was a computer believed to belong to the gunman that had been heavily damaged.

“There are many, many witnesses,” Vance said Monday, promising that any interviews with children would be handled "extremely delicately."

Authorities say Adam Lanza, 20, shot his mother in the head multiple times Friday at their home in Newtown, Conn., before heading to the school, where he fired hundreds of rounds and died with hundreds more at his disposal. He killed 20 children and six women at the school, they said.

At a news conference in Hartford, the state capital, Gov. Dan Malloy called for a statewide moment of silence and for churches to ring their bells on Friday precisely one week after the shootings.

Newtown begins burying 'little souls' lost in school slaughter

An explanation still hasn't emerged for why Lanza killed the 26 people at Sandy Hook.

Malloy appeared to open a window for speculation when he told NBC News on Sunday that Lanza attended Sandy Hook as a youngster. But Vance said Monday that police had discovered no connection between Lanza and the school. Earlier reports that his mother, Nancy, may have taught there also haven't borne out. 

The children — 12 girls and eight boys, all of them 6 or 7 years old — were shot as many as 11 times, authorities said. It appeared that Lanza had enough weapons and ammunition with him to have killed many more.

Obama reassures Newtown 'you are not alone' at vigil for victims of Connecticut school shootings

In addition to an assault-style rifle and at least two handguns, he also had a shotgun in reserve in the car he drove to the school. And when he was found, Lanza still had hundreds of rounds of ammunition in multiple magazines, after having already fired hundreds of rounds inside the school, where he killed himself with a gunshot to the head as emergency crews arrived.

Police said they were analyzing his the weaponry and checking out local gun ranges to learn whether he had ever been spotted at one of them.

Investigators had had high hopes that they could learn more from Lanza's computer, which was found at the home he shared with his mother. But law enforcement sources told NBC News' Pete Williams on Monday that the computer was heavily damaged and that its hard drive had been removed.

Conn. shooting suspect Adam Lanza's father: 'We too are asking why'

Police said Monday that they had had no previous contact with Lanza, and officials at Western Connecticut State University in Danbury — where Lanza enrolled at about 16 in 2008 — said there was never any indication of trouble.

Malloy declined to say whether any documented evidence had been uncovered that Lanza might have been mentally disturbed. But he said there were indications that Lanza had had a deeply troubled childhood. 

Lanza's parents were divorced, and he lived with his mother, who home-schooled him for part of his childhood, Malloy said.

Connecticut school shooter was 'very nervous around people'

"He never seemed to be a good fit," Malloy said. "It was a very difficult time for him and his mother."

Investigators have resolutely refused to go into detail about the timing of events Friday during official briefings. But investigators have told NBC News that Lanza first killed his mother, an avid gun enthusiast, with her own gun and then took multiple weapons with him as he drove to the school in her car.

To bypass security, Lanza smashed in a window, they said. He shot and killed Principal Dawn Hochsprung, 47, and Mary Sherlach, 56, a school psychologist, before proceeding to a classroom, where he found the door locked.

So he moved on to a second classroom, where he killed everyone he found, before doing the same in a third classroom, investigators believe. He then shot himself.

Watch US News crime videos on NBCNews.com

Although he was carrying three weapons, he used only one of them in all of the school killings — a Bushmaster .223-caliber assault-style rifle similar to the one used by the snipers who terrorized the Washington, D.C., area in 2002. It was purchased legally, they said. He used one of the handguns to kill himself.

Authorities haven't said how Nancy Lanza stored the weapons. 

Chief Justice Correspondent Pete Williams and Isolde Raftery of NBC News contributed to this report.

More content from NBCNews.com:

Follow US news from NBCNews.com on Twitter and Facebook