The Saudi officer, who shot dead three sailors at Naval Air Station Pensacola in Florida on Friday, had purchased the gun legally.Mohammed Alshamrani bought the weapon from a gun store earlier this year, CNN reported citing a source. He obtained a hunting license that allows a non-immigrant on a non-immigrant visa to purchase a gun.Alshamrani had opened fire in a classroom and killed three people and injured eight others. He was later gunned down by security forces.The motivation for Alshamrani to open fire in a classroom has not been cleared yet. The 21-year-old did not have any ties with any terrorist groups.Escambia County Sheriff David Morgan told CNN that the FBI had secured the areas on the base where the shooter was staying and they had recovered his laptop and cell phone.A senior administration official told CNN that investigators found some concerning statements and online materials but noted that it was still early in the investigation.When asked about the gunman's motive on
