While the pause in flight operations is of unknown duration, the classroom portion of their training “will resume this week,” she said.

Of the more than 300 grounded Saudi students, 140 are at Pensacola, 128 are at Naval Station Mayport and 35 are at Naval Air Station Whiting Field, all in Florida, according to Genualdi.

Law enforcement officials have questioned other Saudi students at Pensacola, some of whom reportedly took cellphone video at the scene of the attack.

In addition to the three sailors killed, another eight people were wounded in the shooting. The attacker, a Royal Saudi Air Force second lieutenant, was killed at the scene, and investigators are trying to determine his motive.

On Monday, the U.S. Northern Command ordered military bases around the country to implement new security procedures, including more random checks, in the wake of the Pensacola attack and another shooting earlier in Hawaii.