ALLENTOWN - Police say they are still looking for a Burlington County teenager, but the field search for her has been called off.

Police say they have officially classified Sarah Townsend's disappearance as a missing person's case.

The 18-year-old was last seen leaving her home Monday morning on her way to Allentown High School. Emergency officials, search dogs and divers scoured a local park for hours on Monday and Tuesday after her car, purse and cell phone were found there.

Police have found no signs of a struggle or evidence of foul play.