A law enforcement official says authorities investigating the mass shooting at a Connecticut elementary school found more guns inside the school than the initial two that had been reported.

The official would not say what type of guns were found but says all the weapons were being traced by state and federal authorities.

The official was not authorized to speak to reporters about the investigation and spoke only on condition of anonymity.

Authorities say a 20-year-old man opened fire Friday inside the school in Newtown, massacring 26 people, including 20 children, then killed himself. He was carrying at least two handguns.

Other law enforcement officials also speaking on condition of anonymity have said the gunman apparently left a high-powered rifle in the back of a car he drove to school.