Just before 1 p.m., police said they responded to a report of shots fired in the employee parking lot of the facility located at 1 UPS Way in the southwest suburbs.
When police arrived, they found a man and a woman on the ground unresponsive, according to officials.
WATCH: Hodgkins police provide update on fatal shooting at UPS facility
Paramedics examined the victims and determined they were deceased.
Officials said a semi-automatic handgun was recovered from the scene.
Officials have not identified the victims and it is unknown at this time if they were employees of the UPS facility, but said there is no concern for public safety at this point.
A UPS spokesperson released a statement on the incident that read:
"We are deeply saddened by the incident that occurred this afternoon, and we are cooperating with the responding authorities. We will not comment further during an ongoing investigation. Any further questions should be directed to the local authorities."
Police said they are investigating the scene as a murder-suicide.
This is a developing story and will be updated when more information becomes available.