An 84-year-old man died today after a woman found him floating and unresponsive in the rooftop hot tub of College Point, Queens's Spa Castle, NBC 4 New York reports.

The woman who found Hock Ma's body was "walking into the water and felt something by her feet," said Jessica Prescatore, a friend who was also at the luxury, five-story spa. "It was the gentleman. He went under and no one noticed him." Ma was pronounced dead at the hospital.

Spa Castle was cited in April 2013 by the Health Department for not having an updated pool safety plan, though it passed its most recent inspection in September, NBC 4 reports. "Excessive swimming, running or diving will not be tolerated," Spa Castle's current safety policies warn.

It is not clear whether any aquatic supervisors—mandated by the Health Department—were monitoring the pool Ma was in before he died. According to NBC, police could not say whether Ma suffered a medical emergency before being submerged, and the Health Department is reportedly investigating his death.

"It does warrant a closer look so this doesn't happen to someone else and it's a shame it happened to my father," Hock Ma's son James said.

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