PENSACOLA, Fla. (AP) — A U.S. official has identified the shooter at the Naval Air Station in Pensacola as a Saudi Arabian aviation student. Authorities are investigating if the shooting was terrorism-related. The shooting was the second at a U.S. Navy base this week. Escambia County Sheriff David Morgan says 11 people were shot in Friday’s attack, four of whom died, including the shooter. Base commander Capt. Timothy Kinsella Jr. says the base will remain closed until further notice.

The man who opened fire Friday — killing at least three people — at the Pensacola naval base is a foreign national who was in the country for training, according to new reports.

The gunman was identified as a Saudi aviation student, the Associated Press reported.

Sources described him to NBC News as a foreign national.

Jeff Bergosh, a facilities manager at Pensacola Naval Base, described the scene outside the base as "chaos" as authorities responded to reports of a mass shooting and employees arrived for work.