Florida health officials say they're investigating a new Zika case outside a Miami neighborhood where mosquitoes have spread the virus to over two dozen people.

The Florida Department of Health released a statement Friday announcing that its Zika caseload has risen to 28, with three new cases in Miami-Dade County.

Two of the people were exposed within a previously identified zone, a roughly 1-square-mile area encompassing Miami's Wynwood arts district.

The health department said the third infection is outside that zone in Miami-Dade County. Investigators and mosquito control inspectors will be working in that area, but no other details about the location or the patient were released.

According to the statement, the Health Department still believes active transmissions are happening only in the Wynwood area.