The family later noticed the boy was missing. They found him at the bottom of the pool and called 911. Paramedics were not able to revive the boy.
Homicide detectives are calling the drowning accidental.
Just last Wednesday another 3-year-old boy drowned in an apartment pool in northwest Harris County.
Combined with last night's drowning, that makes a total of at least 12 drowning incidents in Harris County this year, including several children.
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