The FDA and CDC E. coli outbreak investigation into illnesses at Taco Bell restaurants in New York, New Jersey, Pennsylvania, and Delaware took a turn this week, when health officials determined that green onions were not the source of the outbreak.

Investigators from the CDC and FDA announced that the likely source of the outbreak is E. coli-contaminated lettuce.

The New York Post reported an increase in the number of victims from the Taco Bell E. coli outbreak. While the outbreak continues, Taco Bell stores that had been closed due to the E. coli outbreak have reopened. Taco Bell has written an open letter stating that food in Taco Bell stores is safe.