WASHINGTON: The suspect in the Washington Navy Yard shooting, Aaron Alexis, used a valid pass to gain entry to the base, the FBI said on Tuesday.
"Mr. Alexis had legitimate access to the Navy Yard as a result of his work as a contractor and he utilized a valid pass to gain entry to the building," said Valerie Parlave, assistant director in charge of the FBI's Washington field office.
Authorities believe Alexis entered the base's Building 197 with a shotgun and may have gained access to a handgun inside.
There is no information that he had an AR-15 semi-automatic rifle, Parlave said, adding that the shotgun was bought legally in Virginia.
Authorities said the suspect killed 12 people on Monday before police shot him dead.