RICHMOND, Va. (AP) — Health officials in Virginia on Thursday reported the first cases in the state of a highly contagious coronavirus variant that first emerged in California last summer.

The discovery of the two California variants in Virginia means there have been a total of four variants found in the state, including variants first discovered in South Africa and the United Kingdom.

The Virginia Department of Health said in a news release that the California variants are associated with increased person-to-person transmission of COVID-19, but there is no evidence at this time that infections with the variants cause more severe disease.

In total, state health officials have reported 176 cases of coronavirus variants in Virginia.

The DPH said it is likely that additional cases with “variants of concern” will be identified. Health officials urged people to continue to comply with mitigation measures, including wearing face masks correctly, staying at least six feet away from others, avoiding crowds, washing hands often and getting vaccinated for COVID-19 when they become eligible.