An 11-month-old boy has died after apparently falling into a septic tank in an unincorporated community in Alabama’s Calhoun County.

The accident happened about 7 p.m. Wednesday at a home in Alexandria, al.com reported.

Sheriff Matthew Wade said the boy’s father had gone to a friend’s home to work on a car. At some point, he noticed his son was missing and went to investigate.

Wade said the manhole on the septic tank had a plastic covering that wasn’t secured. The father found the boy inside the tank, pulled him out and began trying to resuscitate him. The boy was taken to a nearby hospital where he was pronounced dead.

An investigation is underway, but Wade said he doesn’t expect any charges.

“It appears to be just a tragic accident,’’ he said.