A member of the Montclair YMCA has been diagnosed with COVID-19 and officials at the Y are asking the older adults who attended the same exercise class to seek testing as a result.

Ann-Margaret Gutierrez, vice president of operations for the Y, said in an email to members Friday that the member with the virus regularly attended a group exercise class held Tuesdays at 9 a.m. and Thursdays at 10 a.m. called "Strength, Endurance and Balance" at the Park Street location.

The class is for "active older adults," according to the Y website, which indicates the member was last in the building on March 6.

No sign-up is required for the class, so it is not clear if health officials will be able to trace those who took the class.

"We urge those members who attend [the class] to seek medical attention and testing," the email read.

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The Park Street Y was closed at 1 p.m.; the Geyer Family YMCA will close beginning Saturday.

The Y will be closed for two weeks during which a "deep sanitizing clean" will be performed, the website says. Afterward, "we will reassess if we can open or if we need to close for a longer period.

"We do not do this lightly," Gutierrez said in the email. "The priority is to flatten the curve of the virus so that our hospitals do not become overloaded."

This story has been corrected to show that a member of the Montclair YMCA was diagnosed with COVID-19.

Julia Martin covers Montclair for NorthJersey.com. For unlimited access to the most important news from your local community, please subscribe or activate your digital account today.

Email: jmartin@gannettnj.com Twitter: @TheWriteJulia