Three cases of the omicron variant of the coronavirus have been found in Maryland, the first cases of the variant in the Washington D.C. region, Gov. Larry Hogan, R, announced on Friday.

Hogan said the cases were detected in residents who live in the Baltimore metro area.

Two of the cases are from one household, including one person who was vaccinated and recently traveled to South Africa. The second person was unvaccinated and had close contact with the traveler. The third case is unrelated to the other two and there is no known recent travel history.

None of the residents is hospitalized.