Chipotle Restaurant Closed After Workers Become Sick

The Massachusetts location was voluntarily closed to protect customers.

In a statement, a Chipotle spokesman said the restaurant would undergo a "full sanitization" and that no customers have been reported sick.

"After learning that four of our employees were not feeling well, our restaurant in Billerica, Mass. was closed for a full sanitization," a Chipotle spokesman told ABC News. "We do not know if the employees are ill with norovirus and no customers illnesses are connected to this restaurant. Any employees who reported feeling ill will be tested and held out of the restaurant until they fully recover."

The new safety measures include testing fresh produce with DNA-based tests, end-of-shelf-life testing to ensure ingredients are safe throughout their shelf life, while also looking to improve the supply chain by measuring performance data of vendors and suppliers, and enhancing employee training in food safety and handling.