Travis County authorities are investigating the death of an infant found Tuesday morning near Onion Creek.
"A fisherman, who was in the area, accidentally discovered the body of a newborn infant," according to a statement Wednesday from the Travis County sheriff's office.
"The child was located in a shallow grave and is estimated to have been there several days, perhaps a week," the sheriff's office said.
An autopsy was conducted on Wednesday and final results are pending. Investigators are looking into the case as a suspicious death until the exact cause and manner of death are determined, authorities said.
The sheriff's office said it is "concerned about the well-being of the mother and is asking anyone who might have information about the incident or identity of the mother to call 911" or the sheriff's office tip line.