Things are getting worse for Chipotle Mexican Grill Inc. Last month, the Denver-based fast- food company announced that the U.S. Food and Drug Administration’s Office of Criminal Investigations is looking into a suspected norovirus outbreak that sickened more than 130 people who ate at a Sterling, Virginia, restaurant in June.

Last year, the U.S. Department of Justice launched an investigation after salmonella, norovirus and E. coli traced back to Chipotle’s Tex-Mex-themed chain restaurants wreaked havoc in 2015 from coast to coast, sickening more than 500 people. Those incidents included a norovirus outbreak in Simi Valley, California, that sickened 234 people and another in which 140 Boston College students got ill.