CHICAGO (CBS) — An off-duty Chicago police sergeant was being hailed for saving a boy’s life Saturday evening, after he was reported drowned at an Orland Park pool party.

An Orland Fire Protection District ambulance and fire truck responded to a home on Steeplechase Parkway around 6 p.m. Saturday, for calls of a drowning. The boy reportedly was in full cardiac arrest.

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When crews arrived, the boy was conscious and breathing, thanks to a woman who was also at the party.

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“A woman had jumped into the pool, brought the boy up from the bottom, and up to the side of the pool, and performed CPR for several minutes prior to our arrival,” Orland Fire Protection District Battalion Chief Daniel Smith said.

That woman, off-duty Chicago Police Sgt. Cindy Guerra, just happened to be a guest at the party, and was able to revive the boy.

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The boy, who appeared to be 10 to 12 years old, was expected to be fine.