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Conn. school shooting: What we know

On Friday, December 14, a gunman opened fire at Sandy Hook Elementary School in Newtown, Connecticut. Here is what CBS News knows about the shooting as of Dec. 16, 1:14 a.m. ET, per Connecticut police, the Connecticut governor's office and other sources:

  • There were at least 27 victims of a mass shooting in Newtown, Connecticut, on Friday.

  • 20 victims were children attending Sandy Hook Elementary School, which has students from kindergarten through fourth grade, aged 5-10.

  • 18 children died at the school, and 2 died at a hospital.

  • The names of the victims killed in the shooting were released by Connecticut Chief Medical Examiner on Dec. 15. The children were: Charlotte Bacon, 6; Daniel Barden, 7; Olivia Engel, 6; Josephine Gay, 7; Ana Marquez-Greene, 6 ; Dylan Hockley, 6; Madeleine Hsu, 6; Catherine Hubbard, 6; Chase Kowalski, 7; Jesse Lewis, 6; James Mattioli, 6; Grace McDonnell, 7; Emilie Parker, 6; Jack Pinto, 6; Noah Pozner, 6; Caroline Previdi, 6; Jessica Rekos, 6; Avielle Richman, 6; Benjamin Wheeler, 6; and Allison N. Wyatt, 6.

  • 6 adults, including Dawn Hochsprung, 47; Mary Sherlach, 56; Rachel Davino, 29; Anne Marie Murphy, 52; Lauren Russeau, 20; and Victoria Soto, 27 were killed at the school.

  • 1 adult who lived with the gunman, his mother, was killed before the school massacre at their home in Newtown.

  • 1 adult who was wounded by gunshots survived - Natalie Hammond, lead teacher/vice principal - and was treated at Danbury Hospital.

  • Police say the shooter was a lone gunman and was found deceased inside the school from a self-inflicted gun wound.

  • Police found two semi-automatic handguns with the gunman inside the school: a Glock 9mm and a Sig Sauer pistol.

  • The gunman was armed with a Glock 9mm semi-automatic pistol a Sig Sauer semi-automatic pistol.

  • Police also found a semi-automatic Bushmaster .223 caliber rifle inside the car her drove to the school, his mother's car, and shell casings inside the school.

  • All three guns match the type of guns purchased legally by the shooter's mother.

  • The shooter was identified as 20-year-old Adam Lanza (DOB 04/22/92), from Newtown.

  • Police held his 24-year-old brother, Ryan, for questioning, in Hoboken, New Jersey. AP reported Ryan told police he had no contact with brother since 2010.

  • Lanza's mother, Nancy Lanza, 52, was a teacher or teacher's assistant at the school, either in kindergarten or first grade.

  • Lanza's father, Peter, works for GE Energy Financial Services in Stamford, CT. He was questioned by authorities. The parents divorced in 2009.

  • The children killed were students in two classrooms.

  • Police received the first 9-1-1 call at 9:30am.

  • There were 672 children enrolled at the school this year, according to the Connecticut Department of Education.

  • Sandy Hook Elementary is one of 5 elementary or middle schools in Newtown, where there is a total of 9 public schools.

  • Newtown, in Fairfield County, is 45 miles southwest from Hartford and 60 miles northeast of New York City, a suburb of Danbury, population apx. 28,000.

  • U.S. flags at the White House and the Capitol were lowered to half-staff.

  • At the White House, President Obama said: "We have endured too many of these tragedies in the past few years."

  • President Obama said: "I know there's not a parent in America who doesn't feel the overwhelming grief that I do."

  • President Obama said: "Our hearts are broken today."

  • President Obama said: "We're going to have to come together to take meaningful action to prevent more tragedies like this, regardless of the politics."

  • In Newtown, Connecticut Governor Dan Malloy said: "Beautiful children had their lives taken away from them."

  • With 27 fatalities, Newtown is second worst mass shooting in recent U.S. history, as measured by total number of victims killed, second only to Virginia Tech.

  • In 2007, Seung-Hui Cho shot 49 people at Virginia Tech University -- killing 32 and wounding 17 -- before shooting himself.
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