A couple of hundred students from countries outside the US are enrolled in training at the Pensacola base [File: Reuters]

A Saudi airman accused of killing three people after opening fire in a Navy classroom appeared to have posted criticism of US wars and quoted former al-Qaeda leader Osama bin Laden on social media hours before the shooting spree.

The SITE Intelligence Group, which monitors media, said the suspect posted a short manifesto on Twitter prior to the attack at the naval base in Pensacola, Florida, on Friday.

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The attacker allegedly hosted a dinner party earlier in the week where he and three others watched videos of mass shootings, a United States official told The Associated Press.

The FBI on Saturday formally

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