At least eight people were killed after a gunman opened fire at a FedEx facility in Indianapolis late Thursday before also killing himself, police said.
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.
“This is a tragedy,” Cook said.
Some family members were still arriving and learning about the shooting early Friday, she said, with a family reunification site set up.
Police knew of at least four people transported to hospital by ambulance, Cook said, one of whom was in critical condition with injuries consistent with gunshot wounds. Three others were transported with various other injuries, she said.
But there were also people who went or who were taken to hospitals privately, she said, and police were gathering information. No law enforcement officers were hurt, she added.
FedEx said in a statement that “We are deeply shocked and saddened by the loss of our team members following the tragic shooting at our FedEx Ground facility in Indianapolis.”
“Our most heartfelt sympathies are with all those affected by this senseless act of violence. The safety of our team members is our top priority, and we are fully cooperating with investigating authorities,” the company said.
A 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, who WTHR did not name, then ran out of the building and saw one person on the ground, he added.
U.S. Rep. André Carson, D-Indiana, whose district includes Indianapolis, said that he was heartbroken by the incident.
“I am heartbroken by the mass shooting at the FedEx facility here in Indianapolis and praying for all affected by this tragedy,” he said on Twitter. “I am communicating with local authorities to get all details of the attack and my office stands ready to help everyone affected any way we can.”
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.