UPDATE: 12/14/12 5:00 PM
Slain school principal had implemented new security procedures
Principal Dawn Lafferty Hochsprung, one of the adults killed in Friday's shooting, recently had a new security system installed to protect students.
CNN reported that Hochsprung outlined the new rules to parents in a letter this fall, saying visitors would be required to ring the bell to enter after the front doors locked at 9:30 a.m. Staff would use a visual monitoring system to determine entry.
"Please understand that with nearly 700 students and over 1,000 parents representing 500 SHS families, most parents will be asked to show identification," she wrote.
UPDATE: 12/14/12 4:25 PM
Politicians on both sides bring up gun control laws
The White House said today that President Obama would consider reinstating the assault weapons ban during his second term.
"It does remain a commitment of his," said White House spokesman Jay Carney, according to CNN. The Clinton-era ban expired in 2004. ,p> Rep. Jerrold Nadler, a Democrat from New York, said in a statement, "If now is not the time to have a serious discussion about gun control and the epidemic of gun violence plaguing our society, I don't know when is. How many more Columbines and Newtowns must we live through? I am challenging President Obama, the Congress, and the American public to act on our outrage and, finally, do something about this."
However, Rep. Cathy McMorris Rogers, the incoming chairwoman of the House Republican Conference, said, "I think we have to be careful about new, suggesting new gun laws. We need to look at what drives a crazy person to do these kind of actions and make sure that we’re enforcing the laws that are currently on the books," according to The Washington Post.
UPDATE: 12/14/12 3:10 PM
Guns obtained legally
CBS News reported that preliminary information suggested that Adam Lanza, the shooting suspect who killed himself in the school, obtained the guns he used in the shooting legally.
A law enforcement official told CBS News that the guns found at the scene were a Sig Sauer, a Glock 9 and a Bushmaster rifle.
Meanwhile, in Michigan, the Senate and House have passed a bill that would allow the carrying of concealed weapons in areas including schools, churches, day cares and stadiums.
The Washington Post also has nine facts about guns and mass shootings in the United States.
Mark Kelly, the husband of former Rep. Gabrielle Giffords who was shot in the head while campaigning and survived, called on leaders to "do what is right."
He said, "As we mourn, we must sound a call for our leaders to stand up and do what is right. This time our response must consist of more than regret, sorrow, and condolence. The children of Sandy Hook Elementary School and all victims of gun violence deserve leaders who have the courage to participate in a meaningful discussion about our gun laws - and how they can be reformed and better enforced to prevent gun violence and death in America. This can no longer wait."
America's second deadliest school shooting
Sandy Hook has been called the second deadliest school shooting in American history, second only to the Virginia Tech massacre which left 32 dead.
"As a country, we have been through this too many times," said President Obama today. "Whether it is an elementary school in Newtown, or a shopping mall in Oregon, or a temple in Wisconsin, or a movie theater in Aurora, or a street corner in Chicago, these neighborhoods are our neighborhoods and these children are our children."
Child witness describes scene
The AP posted this video:
Emotional images from today's tragedy
UPDATE: 12/14/12 2:35 PM
Latest on shooter's identity
The Associated Press reported, "The suspect in the Connecticut school shootings is Adam Lanza, 20, the son of a teacher at the school where the shootings occurred, a law enforcement official said Friday. A second law enforcement official says the boy's mother, Nancy Lanza, is presumed dead.
"Adam Lanza's older brother, Ryan, 24, of Hoboken, N.J., is being questioned by police, said the first official. Earlier, a law enforcement official mistakenly transposed the brothers' first names."
The AP reported that Adam Lanza was dead of a self-inflicted gunshot wound.
UPDATE: 12/14/12 12:40 PM
Shooter's mother was among dead
NBC News' Pete Williams reported that one of the victims at the school shooting is the mother of the shooter who worked at the school. NBC's Chuck Todd said Williams reported that the class that the shooter targeted was one taught by his mother.
UPDATE: 12/14/12 12:20 PM
Gunman identified as Ryan Lanza
CNN reported that the gunman was identified as Ryan Lanza by a federal law enforcement official who spoke to CNN correspondent Susan Candiotti. Lanza was in his 20s.
UPDATE: 12/14/12 12:15 PM
Connecticut Post raises death toll to 29 dead, 22 children
The Connecticut Post reported that at least 29 people were dead, including 22 children, citing a source with knowledge of the investigation.
A shooting reported at Sandy Hook Elementary School in Connecticut prompted all schools in Newtown County to go into lockdown on Friday.
CBS News reported that at least 27 people are dead, including 18 students.
The preliminary information suggests the gunman was the father of one of the students, according to CBS News' John Miller. However, NBC News tweeted that a federal law enforcement official said the gunman was a 20-year-old from Connecticut carrying two handguns.
The shooter was dead and reportedly had two guns, according to the Associated Press, which cited a person with knowledge of the shooting. It was unclear whether he was killed or took his own life.
The Hartford Courant reported that multiple people had been killed at the school, located on Dickinson Drive. Police said some of the shooting victims were children, but it was not clear how many were among the dead in addition to the one.
The Courant's Dave Altimari tweeted that a state police source said this could be the worse school shooting in US history. One whole classroom was unaccounted for. The Columbine High School shooting in 1999 resulted in 15 killed, including the two shooters.
Gov. Dannel Malloy was on the scene to get a briefing from state and federal authorities, according to WTNH.
Connecticut State Police said they responded to reports of a shooting at the school, which was reported at 9:41 a.m., according to local news channel WFSB.
According to the Newton Bee, police, ambulance and emergency crews were at the scene and there were multiple reports of injuries.
The Courant confirmed that state police sources said one shooter was dead. Earlier reports of a second shooter remained unconfirmed.
"Groups of students — some crying, some holding hands — were being escorted away from the school by their teachers," said The Courant.
A witness told WTNH that she saw two children, one with a bloody face, the other with a hand injury.
A dispatcher at the Newtown Volunteer Ambulance Corps said a teacher had been shot in the foot and taken to Danbury Hospital, according to the AP. Officials at Bridgeport Hospital confirmed that they had treated one woman who was shot, and she was in stable condition, according to WFSB.
WFSB reported that Yale-New Haven Hospital has activated its emergency triage unit which responds to mass casualty incidents.
State police spokesman Lt. J. Paul Vance said several troopers responded to the school, but would not confirm what was happening.
Newtown emergency officials told parents to stay by their phones and avoid going to the school.
"We are here to care for any victims and their families in any way they need us. Our hearts and prayers are extended to anyone involved in this terrible tragedy. To date, three patients have been transported to Danbury Hospital from the scene," said a statement from Danbury Hospital.
The Newton Bee posted a picture of children being led through the school's parking lot by a teacher, some looking visibly shaken.