At least eight people were killed after a gunman opened fire at a FedEx facility in Indianapolis late Thursday, police said.
The suspected gunman also killed himself.
Multiple other people were transported to hospital with injuries, police said.
The shooting was reported at the FedEx facility shortly after 11 p.m. and officers arrived to an active shooter incident, police spokeswoman Officer Genae Cook told reporters.
She said the gunman killed himself at the scene. A search found eight people deceased with injuries consistent with gunshot wounds, she added.
That number does not include the gunman.
Cook said it was too early to tell if the shooter was an employee of the facility, and that an active investigation was underway. A motive was also unclear.
FedEx said in a statement that “We are aware of the tragic shooting at our FedEx Ground facility near the Indianapolis airport.”
“Safety is our top priority, and our thoughts are with all those who are affected. We are working to gather more information and are cooperating with investigating authorities,” the company said.
An unnamed witness told NBC affiliate WTHR of Indianapolis that while working inside the FedEx facility he heard gunshots and when he looked up he saw a gunman. He said he ducked after hearing several more shots. The witness then ran out of the building and saw one person on the ground, he added.
There have been several mass shootings in the U.S. in recent weeks, including an April 8 shooting at a cabinet company facility in Bryan, Texas, that left one person dead and five others wounded.