Police are investigating a violent early morning robbery at the Walmart Neighborhood Market in Madison.
Three masked gunmen entered the business at 109 Gallatin Pike around 2:30 a.m.
Surveillance video shows the three men wearing latex gloves and backpacks demanding money from both employees and customers.
Detective Jamey Bledsoe said at least a handful of customers were forced to the ground.
"People were put on the ground, employees and customers I believe, and I know the manager had a gun held on him."
Video shows a gun pointed at the back and head of a manager while the gunmen demanded cash from the registers.
"Here's pictures, kind of brutal, but pictures of the silver gun to the manager's back," Detective Bledsoe explained.
The suspects left in a getaway car, described as a small, dark-colored SUV.
Police are asking the public's assistance in identifying the men. Anyone with information should call Nashville Crime Stoppers at 615-74-CRIME.
441 Murfreesboro Road Nashville, TN 37210