Dozens are dead, including 20 children.
A law enforcement official in Washington said the attacker was a 20-year-old man with ties to the school and that one of the guns was a .223-caliber rifle. The official also said that New Jersey State Police were searching a location in that state in connection with the shootings. That official spoke on the condition of anonymity because the source was not authorized to speak on the record about the developing criminal investigation. It is not known whether the shooter took his own life or was killed.
CBS News reports that a potential second shooter is in custody and that SWAT is now investigating the home of the suspect.