The 21-year-old suspect was arrested after continuous shooting at the three spa in Georgia, killing 8 people, but it was unclear the engine attacks.
The shooting started from about 17h on March 16 (5pm on March 17, Hanoi), when 5 people were shot at Young's Asian Spa Massage near ACworth, Atlanta City, the state capital of Georgia.
By 17:50, Police Buckhead, Atlanta, received a message about the Gold Spa shooting.
While looking at the scene, they found bullets shot from the other side of the road, so checked the Spa Aroma Therapy opposite and discovered more a bodies a woman shot dead inside this facility.
Police at the scene of A Aroma Therapy Spa Razor in Atlanta, Georgia, the United States on March 16.
Suspect Robert Aaron Long, 21, was about 240 km from Atlanta, after more than three hours of shooting.
"Investigators are collecting information from both fields to exactly determine what happened and try to collect relevant suspects or suspects", according to the Atlanta police statement.
The Federal Investigation Department (FBI) is supporting local law enforcement agencies investigating incidents.
The position occurred the shootings in Georgia, the United States on March 16.