Italian authorities have announced they are shutting down Venice’s famed Carnival events in a bid to stop the spread of the new virus, as the number of infected people in the country soars to at least 152, the most outside Asia.

The Veneto regional governor said the shutdown will begin Sunday evening.

Carnival, which draws tens of thousands of visitors to the lagoon city, would have run through Tuesday.

Nearly all of Italy’s cases are clustered in the north, including in the northeast Veneto region which includes Venice.

Authorities say they haven’t pinpointed the source of the outbreak.