Taco Bell is pulling all green onions from its stores after an e-coli outbreak out east.
The company says a lab found a strain of the sometimes deadly bacteria in three samples of green onions.
But the tests could not conclusively say if the onions were the cause of the outbreak.
Close to 50 people have come down with e-coli in New York, New Jersey, and Pennsylvania.
The company pulled the onions from all of the chain's nearly 6,000 restaurants.
Some stores near where the outbreak started have been closed.