That compares to 506 cases and one death in the previous 24-hour period.
The Health Ministry said all four patients were unvaccinated.
On Friday, the ministry announced 860 positive cases and three deaths. All three patients were also not vaccinated against the virus.
Fiji now has 8576 active cases in isolation with 55 deaths - all but two of them from the latest outbreak which began in April this year. There has been a total of 10,512 COVID cases in Fiji since March, 2020.