DENVER (KDVR) — The City and County of Denver on Thursday ordered the closure of a United States Postal Service distribution center.

The facility is located at 7550 E. 53rd Pl. in northeast Denver and handles mail for all of Colorado and Wyoming, which have a combined population of about 6.5 million people.

The Denver Department of Public Health and Environment (DDPHE) says it “responded to clusters of COVID-19 cases involving multiple employees at several USPS locations over the last week.” The city did not disclose how many confirmed cases there are at the distribution center. FOX31 and Channel 2 have reached out to the city for those details.

On Wednesday, DDPHE staff visited the facility. However, they could only make “minimal observations” because of “the refusal of information and access to the facility,” the city said in a statement.

The department added the following about its Wednesday visit:

“The area the investigators were able to make observations from was a small public-facing space in comparison to the entire distribution warehouse buildings. In the general public post station with three employees assisting customers with proper face coverings and plastic curtains separating each employee check-out station.” Read more at Fox 31 Denver

USPS issued a response via Twitter:
The Denver Distribution Center remains open as we sort 10 million pieces of mail a day for every person in CO and WY including medications, stimulus checks, and election materials. We are meeting all CDC and federal guidelines for COVID-19. USPS is an Essential Service.