FALL RIVER (CBS) — A woman’s body was found floating in a public swimming pool in Fall River Tuesday night after a few days in the water, according to police.

Marie Joseph was last seen by the Veteran’s Memorial swimming pool in Fall River on Sunday. Investigators said the 36-year-old Joseph went down a slide with a 9-year-old boy.

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“Marie unexpectedly slid down the slide, landing on top of (the boy). He further stated he believed Marie went under the water and did not surface,” said Chief Daniel Racine of the Fall River Police Department.

WBZ-TV’s Jonathan Elias reports.

“We’re not certain about anything other than the fact that we have a death and that this person was at the pool, and what took place with respect to the slide. Everything beyond that is absolutely under investigation,” said Samuel Sutter, the Bristol District Attorney.

Marie Jospeh's body was found on Tuesday night after a few days in the pool.

On Sunday night, an employee discovered clothing, a cell phone and a license near the Lafayette Park Pool on Eastern Avenue. The employee then called police, who went to the address to find nobody home.

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The pool was open to the public Monday and Tuesday with lifeguards, but no one saw the body under 12 feet of water.

In response to the discovery of the body, the Department of Conservation closed all 30 of the DCR’s deepwater pools while officials conduct a “full review of each facility’s safety and operation procedures over the next 24 to 48 hours.”

Officials also placed the entire staff at the Fall River pool on administrative leave.

Recreation Commissioner Edward M. Lambert, Jr. released a statement about Joseph’s death:

“On behalf of the Department of Conservation and Recreation, we express our deepest condolences to the family and friends of Marie Joseph… We will continue to cooperate fully with local and state law enforcement during their ongoing investigation.”

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Police said that Joseph was not reported missing and they are investigating how her body went unnoticed in the pool for so long. They do not believe the cause of  her death is suspicious.