Oysters from the Drakes Bay Oyster Co. in Marin County, California, have been linked to an outbreak of Vibrio parahaemolyticus that has sickened at least three people.

KTVU reports the company is conducting a voluntary recall of the affected oysters, which include shucked oysters in 9 ounce, 1 pint, 1 quart and half-gallon jars and tubs, lot Nos. 363 through 421.

Affected in-shell oysters are sold individually or in bags sized from 1 dozen to 10 dozen, and marked with harvest tags between July 17 and Aug. 8.

Anyone in possession of the affected oysters should throw them away immediately, health department officials said.