Consumer Reports Claims Romaine Lettuce Linked to Lethal US, Canada E. Coli Illnesses

Romaine lettuce has been identified as the source of E. coli bacteria which has killed two people in the past three weeks. Justin Sullivan/Getty Images

Outbreaks of illness caused by the E. coli bacteria have health officials in the U.S. scrambling to find a source, while Canadian health officials have pinpointed romaine lettuce as the likely culprit, The Toronto Star reported.

Consumer Reports, a consumer advocacy group, says the U.S. government should issue stronger warnings while it investigates, NBCNews reported.