The Parisian luxury hotel in Macau, China, has been linked to a possible outbreak of Legionnaires’ disease after three elderly Hong Kong residents were sickened between December 2016 and April, according to multiple news reports.

Macau Health Bureau authorities said two victims have been hospitalized, with one in critical condition and the other in serious condition, and the third has recovered. Two of the men stayed overnight at the hotel, while the third was merely visiting the property.

The Health Bureau ordered Parisian officials to temporarily close the pool, water fountains, and Jacuzzi, as well as to conduct a thorough inspection, cleaning, disinfection, and testing of the water system and possible infected areas. The Health Bureau has completed its testing, and the results are expected back this week.

The $2.7 billion hotel, a five-star resort owned by the Las Vegas Sands, opened September 13, 2016.