Authorities near Portland, Oregon said they were searching for a 2-year-old boy last seen playing in his home's front yard but out of sight of his parents.

The 2-year-old Siletz boy who went missing Saturday while playing in his parents’ front yard was most likely by the river bank when he disappeared, the Lincoln County Sheriff’s Office said Tuesday as the fourth day of the search for the toddler came to a close.

A 2½-year-old boy missing since Saturday from his parents’ property along the Siletz River appears to have last been at the water’s edge before he disappeared,