Connecticut elementary school massacre: 20 children among 27 dead Updated at 4:14 p.m. Twenty children were killed Friday in a shooting at a Connecticut elementary school that left a total of 27 people dead, including the gunman, the police said. Six adults were killed in the shooting at Sandy Hook Elementary School in Newtown, Connecticut State Police spokesman Lt. Paul Vance told reporters at an afternoon news conference. A source familiar with the investigation identified the shooter as 20-year-old Adam Lanza, CBS News investigative producer Pat Milton reports. Law enforcement sources had earlier told CBS News that the gunman was Ryan Lanza, Adam Lanza's older brother. Ryan Lanza is being questioned by authorities in New Jersey, Milton reports. Vance said police found the gunman deceased inside the school. He did not say how the shooter died. A law enforcement official told CBS News that the gunman's mother worked at the school and is among the dead. The gunman apparently targeted his mother and her classroom, the official said. Most of the shooting occurred in that classroom. Some of her students were among those killed. Separately, a dead body was found at a secondary crime scene in Newtown, Vance said. Law enforcement sources told CBS News senior correspondent John Miller the gunman apparently drove to the school from New Jersey. A law enforcement official in Washington told The Associated Press that New Jersey State Police were searching a location in that state in connection with the shootings. Obama: "We have been through this too many times" Miller reports authorities have an individual in custody who investigators said may be a possible second shooter. CBS News correspondent Bob Orr reports that authorities found two guns on the gunman's body, a Glock 9 mm pistol and a Sig Sauer pistol. A Bushmaster assault rifle was found in his vehicle, Orr reports. The weapons appeared to be legally purchased, one source told Orr. "Our hearts are broken today for the parents and grandparents, sisters and brothers of these little children and for the families of the adults who were lost," an emotional President Obama said Friday afternoon in a statement delivered from the White House briefing room. Our hearts are broken for the parents of the survivors, as well. For, as blessed as they are to have their children home tonight, they know that their children's innocence has been torn away from them too early, and there are no words that will ease their pain. White House spokesman Jay Carney said Mr. Obama was informed of the shooting at 10:30 a.m. Stephen Delgiudice said his 8-year-old daughter heard two big bangs and teachers told her to get in a corner. Delgiudice's daughter told him that she heard the loudspeaker come on and swearing being broadcast over it, Delgiudice told CBS News. "That's basically what saved their lives I think," Delgiudice told CBS News.