An E. coli outbreak in the Denver Metro Area has been traced back to Jimmy John’s, a sandwich chain restaurant. People claimed to have fallen sick from eating sandwiches served in three of the chain’s branches. The Colorado Department of Public Health and Environment, CDC (The Centers for Disease Control and Prevention) and the FDA (Food and Drug Administration) are currently investigating the outbreak.

According to FOX31 Denver, a lot of people contacted the station after hearing news of the outbreak investigation. Bill Marler, an accomplished personal injury and products liability attorney, also chimed in on the outbreak, noting it wasn’t the first time that the restaurant had sickened many. He detailed the history of Jimmy John’s food safety problems in a blog post which revealed that food safety issues involving the restaurant didn’t start this year, but in 2008 and 2011, with contaminated alfafa sprouts and iceberg lettuce, and clover sprouts respectively.

Colorado Department of Public Health and Environment epidemiologist Alicia Cronquit said the outbreak came from tainted raw produce. Contaminated sandwiches from the restaurant were reported to have been consumed between the fifth and ninth of October. Customers got sick around October 7th to 15th. The Colorado Health Department was alerted of the outbreak on the 18th.

The Centers for Disease and Control and Prevention confirmed that no other E. coli strains were found in surrounding states and areas. A CDC official maintained that only eight outbreaks have occurred this year. None of the restaurants have been shut down nor publicly identified because authorities did not find them at fault for the foodborne illness outbreak, according to Huffington Post.