Ten players from the Boston College men’s basketball team have possibly been stricken with E. coli, along with 20 other students, all possibly linked to the Cleveland Circle Chipotle Mexican Grill (turns out it was Norovirus).

Chipotle said it had temporarily closed the restaurant.

Shares in the company fell another 6 per cent.

“We do not have any evidence to suggest that this incident is related to the previous E. coli incident,” Chipotle spokesman Chris Arnold said in an email. “There are no confirmed cases of E. coli connected to Chipotle in Massachusetts.”

Boston College officials sent alerts on Monday to students, informing them of the suspected food poisoning.

The time between ingesting E. coli bacteria and feeling sick is usually three to four days, but may be as short as one day or as long as 10 days, according to the U.S. Centers for Disease Control and Prevention. Symptoms often begin slowly with mild belly pain or non-bloody diarrhea that worsens over several days.