First coronavirus cases seen in Puerto Rico

A transmission electron microscope image shows SARS-CoV-2, also known as the 2019 novel coronavirus, which causes COVID-19, isolated from a patient in the United States. Note the crown-like spikes on the outer edge of the virus, hence the term "coron ( NIAID-RML )

Officials say tests have confirmed three cases of the new coronavirus in Puerto Rico, the first for the U.S. territory.

Gov. Wanda Vazquez said Friday night that the public school system would close for 14 days and that no cruise ships or the ferry from the Dominican Republic would be allowed to dock.

MORE NEWS: 25 new cases of coronavirus announced, including the 1st in Orange and Osceola County, health officials say

MORE NEWS: President Trump reveals he took coronavirus test

Vazquez said one of the cases involved a local man who had relatives who traveled off the island and the other two are tourists from northern Italy who arrived on a cruise ship.

Even before the announcement, several events including concerts and a circus performance had been canceled on the island due to worries about the virus, which has spread around the world. The University of Puerto Rico and some private colleges canceled classes.

GET UPDATES ON THIS STORY FROM FOXBUSINESS.COM