U.S. Embassy in Ciudad Juarez (State Dept. photo)

WASHINGTON (March 14, 2010)--Three people affiliated with the U.S. consulate in Ciudad Juarez, Mexico, across the border from El Paso, have been killed in a drive-by shooting, a U.S. official said Sunday.

The official, who spoke only on the condition of anonymity to discuss sensitive information, said two American citizens and a spouse of a Mexican employee were killed Saturday afternoon.

A Chihuahua state prosecutors' spokesman says a couple was shot to death in their car near the Santa Fe International Bridge in Ciudad Juarez.

A baby was found unharmed in the back seat.

The spokesman said the woman had a credential identifying her as a consulate employee and the man was carrying a document that identified him as a U.S. citizen.

A relative, Robert Cason, later identified the couple as Lesley A. Enriquez and her husband Arthur H. Redelf of El Paso.

Cason is Redelf's stepfather.

The 1-year-old baby was in the custody of Mexican social services, Sunday.

The White House, meanwhile, said an American consulate employee and her husband, who was a U.S. citizen, were killed.

The White House said the husband of a consulate employee who was a Mexican citizen was also killed.

The White House said President Barack Obama is outraged by the news of the deaths.

The State Department has authorized U.S. government employees at six U.S. consulates in northern Mexico to send their family members out of the area because of concerns about rising drug-related violence, including the post in Ciudad Juarez.