The incident was reported Monday at 11 p.m. at a location at 365 Sackman Street.
Police say a 45-year-old man and a 28-year-old woman, part of a voluntary ambulance squad, responded to that location for reports of a patient experiencing "difficult breathing."
They took the elevator to the 11th floor where they were met by a masked man with a firearm.
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The suspect took their supply bag and sent them back downstairs to the lobby. The bag was later found with the radio and tablet missing.
Authorities say there was no patient, it was a fake call to lure them to the location.
No injuries were reported, but the suspect remains on the loose.
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