The discovery was made around 4:30 p.m. at Dana Point Condominiums on East Central Road in the 1500 block of East Central Road Arlington Heights.
Police and fire department members responding to a 911 call found two people unconscious in a utility room who had "experienced traumatic injuries and were beyond medical care." It was later confirmed they were both dead.
Arlington Heights police said "Information was received that confirms the two deceased had an employment relationship as a supervisor and employee."
A death investigation is now underway and no further information was available.