Federal investigators have not disclosed any motive behind the attack, which unfolded at dawn on Friday when the Saudi national is said to have began firing a handgun inside a classroom at the Naval Air Station Pensacola.
A vigil was held on Saturday for those wounded and killed, among them a recent Naval Academy graduate who dreamed of being a fighter pilot, according to the victim's family.
A sheriff's deputy fatally shot the gunman, authorities said, ending the second deadly attack at a U.S. military base within a week. Within hours, Saudi Arabia's King Salman had called U.S. President Donald Trump to extend his condolences and pledge his kingdom's support in the investigation.
Authorities confirmed the suspect was a member of the Royal Saudi Air Force who was on the base as part of a U.S. Navy training program designed to foster links with foreign allies. They declined to disclose his name or identify his victims.
Two U.S. officials, speaking on condition of anonymity, named the shooter as Second Lieutenant Mohammed Saeed Alshamrani.
At least three of the eight people wounded were law enforcement shot as they responded to the attack, officials said, including one Navy police officer and two county sheriff's deputies. They were expected to recover.
One of the dead was identified by relatives as Joshua Kaleb Watson, 23. A recent graduate of the Naval Academy in Annapolis, Maryland, he had arrived at Pensacola two weeks ago for flight training, his family said.
"Joshua Kaleb Watson saved countless lives today with his own," Watson's brother, Adam Watson, wrote on Facebook on Friday. "After being shot multiple times he made it outside and told the first response team where the shooter was and those details were invaluable."
OTHER SAUDIS QUESTIONED
Six other Saudi nationals were being questioned by investigators in Florida, three of whom were seen filming the incident, the New York Times reported, citing an unidentified person briefed on the investigation.
An uncle of Alshamrani, Saad bin Hantim Alshamrani, told CNN from Saudi Arabia that his nephew was 21, and "likable and mannered towards his family and the community." He said his nephew "has his religion, his prayer, his honesty and commitments."
The younger Alshamrani appeared to have posted a justification of his planned attack in English on Twitter a few hours before it began, according to SITE Intelligence Group, which tracks online Islamist extremism.
He referred to U.S. wars in the Middle East, writing that he hated the American people for "committing crimes not only against Muslims but also humanity," and criticizing Washington's support for Israel, SITE's analysis said. He also quoted bin Laden, the Saudi mastermind of the attacks on the United States on Sept. 11, 2001, according to SITE.
Reuters has not verified the authenticity of the account, @M&MD_SHAMRANI, which was suspended by Twitter on Friday. The Federal Bureau of Investigation declined to answer questions about the account.
GLASS AND BLOOD
About 100 people gathered at the Olive Baptist Church for a vigil on Saturday, where Chip Simmons, chief deputy in the Escombia County Sheriff's office, recounted being one of the first on the scene, which he said was littered "with glass and blood, with killed and wounded lying on the floors."
"You realize in that moment that you are witnessing loss of life and hatred, but there was also heroism," Simmons said.
Pastor Mike Dimick, a former airman, said he knew one of the wounded law enforcement officers.
"None of these young students came to that base expecting to be engaged in live fire," he said. "That happens down the line, after they leave here and face combat."
The base outside Pensacola, near Florida's border with Alabama, is a major training site for the Navy and employs about 16,000 military and 7,400 civilian personnel, according to its website. It is a prominent force in the city.
On Wednesday, a U.S. sailor shot three civilians at the historic Pearl Harbor military base in Hawaii, killing two of them before taking his own life.
Military personnel are normally restricted from carrying weapons on U.S. bases unless they are part of their daily duties.
Teresa O'Neal, a baker selling loaves of bread and pastries at a flea market in downtown Pensacola, said she has a nephew in the Air Force who was on base at the time of shooting, and she criticized the weapons restrictions."Why American soldiers cannot carry weapons on base is a big question," O'Neal said. "Our boys were just sitting ducks in that classroom."