More possible E. coli concerns at Chipotle after several Boston College students were sickened after eating at one of its restaurants.

FOX's Gurnal Scott with more:

Officials with Chipotle now think the norovirus is to blame for the weekend stomach problems of about 30 Boston College students... That conclusion has not been confirmed, but the Boston location remains closed.

The restaurant chain says it does not believe these particular cases are related to the E. coli outbreak linked to Chipotle out West.

A source for this possible norovirus spread has not been found, but the CDC in Atlanta says contaminated food and water, unclean surfaces, and people not washing their hands can transmit it.

Gurnal Scott, FOX News.