The Boston Globe reported last night reported that an E. coli O157: H7 outbreak had shuttered three locations of the Chicken & Rice Guys, as well as its fleet of Middle Eastern food trucks, Boston health inspectors said Tuesday.

Today, that number jumped to 15 with at least 10 people hospitalized.

The department confirmed 15 cases of E. coli O157: H7 stemming from the Chicken & Rice Guys Allston location, which supplies food to the chain’s other outposts. The problems led to the suspension of its operating license.

The company’s four food trucks, which rotate locations around Greater Boston, were taken off the road Tuesday afternoon.

According to Boston Inspectional Services, the city received an anonymous complaint and opened an investigation Tuesday. Public health officials remained at the Allston site throughout the afternoon trying to determine a specific source of the outbreak.