Authorities have identified Adam Lanza as the 20-year-old gunman who fatally shot 26 people at a Connecticut elementary school on Friday morning, after killing his mother.

Lanza fatally shot his mother Nancy Lanza and then drove his mother's car to the school. After arriving, he shot out the glass of a security door at the school shortly after 9:30 a.m. Many of the children killed were in two classrooms.

Lanza died from a self-inflicted gunshot wound. Lanza's older brother, 24-year-old Ryan Lanza, was initially identified as the shooter by authorities, who later said he was not involved, reports the Associated Press.

Three weapons, including a .223 Bushmaster rifle and two 9mm handguns, were recovered from the scene. The medical examiner has said the victims were all shot multiple times with the rifle. Adam Lanza was also wearing body armor.

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