More than 100 new coronavirus cases have been confirmed in Massachusetts in the past day and three more people have died, bringing the Bay State’s total to 646 confirmed cases and five deaths, according to a state Department of Public Health update on Sunday.

The state reported 121 new cases on Sunday.

Of the 646 confirmed cases in the Bay State, 99 cases are tied to the Biogen employee conference in Boston’s downtown waterfront in late February.

Of the remaining cases, 83 are tied to local transmission, 68 are travel-related, and 396 are under investigation.

Middlesex County has the most confirmed cases with 199. Suffolk County has 126 confirmed cases, and Norfolk County has 75 confirmed cases.

Five people in Massachusetts have now died from coronavirus, according to state officials.

More than 32,000 coronavirus cases have been confirmed in the U.S., and at least 400 people across the country have died from the highly contagious disease.

More than 325,000 cases have been confirmed around the world, and at least 14,000 people have died from the disease.