Green onions cited in Taco Bell E-coli outbreak

The recent outbreak of the E-coli bacteria in Taco Bell locations in three states may have been caused by the bacteria's infection in green onions used at the restaurant, according to the company, which removed from its 5,800 U.S. restaurants yesterday to be safe.

Taco Bell said that preliminary testing by an independent lab found three samples of green onions appeared to have a dangerous strain of the bacterium. Result -- the company pulled all green onions from all restaurants.

Taco Bell has not yet named the supplier of the green onions -- also known as scallions -- so at this time, it's unclear whether contaminated green onions reached other restaurants or supermarkets outside of Taco Bell locations.