By CBSLA Staff

LOS ANGELES (CBSLA) — Coronavirus cases in Los Angeles County continued to rise headed into the height of the holiday weekend.

On Saturday, Los Angeles County reported 644 new cases of COVID-19 and seven deaths.

Health officials say the increase is being fueled by the more contagious Delta variant.

With four million LA residents still unvaccinated, officials say there is enough of a risk for the Delta variant to pose a “significant threat.”