There were 21 new cases of the coronavirus in Hawaii on Saturday, including 17 new cases on the Big Island, according to the state Department of Health.

Three cases also required hospitalization, bringing the total number of those hospitalized due to COVID-19 to 51.

There were no deaths reported, however, and the state’s total case count rose to 574. Of those, 410 people who previously tested positive were released from isolation.

Hawaii County had the single biggest jump of the four counties on Saturday. Its total number of cases rose to 61. Two more cases were reported on Oahu, which now has a total 382 cases.

Maui also reported two new cases for a total of 104. Kauai reported no new cases and still has 21 total.

The spike in cases on the Big Island is likely tied to a cluster of cases the DOH previously investigated involving two McDonald’s restaurants in Kona.

The DOH previously said that 14 cases were tied to those restaurants. On Saturday, that number rose to 29, including 17 employees and 12 of their household members, according to a press release.

The McDonald’s locations at the Kona Commons and a Walmart in Kona remain closed. The DOH is still conducting contact tracing for potential cases associated with the cluster.

Close contacts of those cases are in isolation or quarantine, according to the press release.