EMERYVILLE -- Authorities are trying to identify and determine the cause of death for a woman whose body was found Thursday morning on the beach at Shorebird Park.

A passer-by saw the body about 7:14 a.m. and called police.

Officer Brian Head said until the autopsy is completed, police are investigating the incident as an unattended death.

Police are not sure how long the woman had been on the beach before she was found or if she washed up on the shore from the bay.

She was clothed, police said.

The park is east of Interstate 80, off Powell Street next to Chevy's Restaurant, authorities said.

Anyone with information about the woman can call police at 510-596-3700.