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Three people have been killed and four others wounded after a naked gunman opened fire at a Waffle House restaurant before fleeing.
Metro Nashville police said the gunman, armed with an AR-15 style assault rifle, opened fire just before 3.30am in Antioch, Tennessee.
A customer then wrestled away his rifle before he fled on foot, police said.
He was described as a white man with short hair. Officers also said the gunman was nude at the time of the incident.
The suspect, who local reports say was initially wearing just a green jacket, is still believed to be at large.
Police have released a photo of Travis Reinking, 29, who they have described as a "person of interest" following the shooting.
They said the vehicle the gunman arrived in was registered to him.