Reports say the girl was part of a swimming class.
However, during a head count it was reported that the child was not found.
She was later found at the bottom of a pool.
On Sunday, a 22 month old child who allegedly went missing was found dead in swimming pool in Mayaro.
Speaking at the weekly police news briefing, Public Information Officer of the TTPS, Inspector Wayne Mystar, also called on parents and guardians to properly supervise those in their care.