LIVINGSTON, Calif. -

A California chicken plant that reopened over the weekend after it was shut because of a cockroach infestation says it's "voluntarily and temporarily" suspending operations again.
   
Foster Farms said Sunday it was closing the plant in Livingston for several days so it can properly implement new food safety measures.
   
Work had resumed Saturday after Foster Farms announced that it met the demands of the U.S. Department of Agriculture by performing a thorough cleanup and treatment of the plant.
   
The plant closed Jan. 8 when inspectors found the cockroaches on five separate occasions in various parts of the plant over four months. The closure came three months after inspectors threatened a shutdown because of salmonella problems at the Livingston plant and two Foster Farms sites in Fresno.