Green onions suspected of sickening Taco Bell customers in six states have been traced to one of Ventura County's largest vegetable growers, but authorities said Thursday it was too early to blame anyone for the outbreak, the Los Angeles Times reports.

Taco Bell Corp. voluntarily removed green onions from its restaurants Wednesday after discovering that the "vast majority" of at least 58 people who suffered E. coli food poisoning in the last week, mostly in New Jersey and New York, had eaten at a Taco Bell, federal officials said Thursday. No one has died, but 48 people have been hospitalized with kidney failure or other problems caused by the bacteria.

Taco Bell said its preliminary testing had found a strain of E. coli in its green onions, although it is awaiting confirmation from more accurate tests.

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