One person was killed and 13 others were hurt in a shooting at a Kroger grocery store in Collierville, Tennessee, near Memphis, authorities said.
The suspected shooter is also dead from an apparent self-inflicted gunshot wound, police said.
Police said there were "very serious" injuries among those taken to the hospital. Twelve people were transported for injuries, while at least one person walked into the hospital.
Some hid in freezers and locked offices when the gunfire broke out at about 1:30 p.m. local time, police said. One employee fled to the roof and was escorted to safety by police.
A cashier told Memphis ABC affiliate WATN that she ran into a back room with customers. The cashier said the gunman came in shooting, striking an employee in the head, a customer in the stomach and an employee in the cheek. She said the gunman then left and continued to open fire.