The scallions suspected in the E. coli outbreak linked to Taco Bell came from a Southern California grower, an official with the company that washed, chopped and packed them for the restaurant chain has said.

Ready Pac Produce, the sole supplier of green onions to Taco Bell restaurants in the New York, New Jersey and Philadelphia areas, where most people got sick, stopped scallion production at its Florence, N.J., plant that was inspected by federal food officials.