Published: Sep 01, 2010 4:19 PM EDT
Updated: Sep 01, 2010 1:19 PM EDT

LAKE WORTH, Fla. (AP) - Palm Beach County Sheriff's deputies are looking for the mother of a female fetus mysteriously found on a South Florida beach.

Authorities say they're concerned about the mother's well being after finding the roughly 20-week old fetus Monday night. It's unclear how the fetus got there. No other details were available.