A days-long search for a missing baby boy in Louisiana has ended after a truck driver spotted the one-year-old crawling through the grass alongside a busy highway.

Sheriff Gary Guillory told the BBC that the child's discovery "was a miracle", after he survived alone outdoors for "two days with no water and no food".

Calcasieu police had been searching for the baby since 8 July, the day they found his four-year-old brother deceased in a nearby pond.