Why is the Pensacola shooting being investigated as a terror attack? Here's what we know now

Authorities on Monday continued to investigate a shooting at a Florida naval base that left three people dead and eight wounded as a possible act of terrorism.

A Saudi pilot training at Pensacola's Naval Aviation Schools Command was fatally shot by a sheriff’s deputy during the rampage Friday.

Second Lt. Mohammed Alshamrani, 21, of the Royal Saudi Air Force was the sole shooter, armed with a legally purchased 9mm Glock handgun and several extra magazines, and no arrests have been made in the case, FBI special agent in charge Rachel Rojas said Sunday.

Rojas also said investigators were still trying to determine a motive for Friday's attack.

Here's what we know about the investigation Monday:

Why is the shooting being investigated as an act of terror?

"We work, as we do with most active shooter investigations, with the presumption that this was an act of terrorism," Rojas said at a Sunday news conference. However, she said the "investigation has not led us to any information that indicated any credible threat to our community."

Rojas said investigators were probing whether the shooter acted alone or within a network or whether "any possible ideology" prompted the attack.

Florida Gov. Ron DeSantis called the shooter somebody with "deep-seated hatred for the United States," who should have been vetted by both the American and Saudi militaries.