The Porterville Police Department is investigating the drowning of a three-year-old child on Sunday.PORTERVILLE, Calif. (KFSN) -- The Porterville Police Department is investigating the drowning of a three-year-old child on Sunday.Investigators did not reveal the exact location but say the child was able to get into the backyard undetected and fell into the pool.Despite life-saving efforts, they say the toddler could not be revived.No additional information was provided. Report a correction or typo