Turning to national news now...The U-S State Department is urging Americans to delay unnecessary travel to some parts of Mexico.The warning follows awave of violence in recent days including the brutal murder of three people connected to the American consulate in Juarez.CBS News Correspondent Whit Johnson has the latest from Washington.(nats:) (Juarez, Mexico)Mexico is vowing to bring to justice the criminals responsible for this heinous scene.American consulate employee Leslie Enriques and her husband Arthur Redelfs -- both U-S citizens -- were driving through the city of Juarez Saturday when they were gunned down in broad daylight. The couple's baby who was sitting in the back seat survived the attack.(nats:)The brutal murders took place just minutes after the husband of ANOTHER consulate worker was killed -- his two children wounded. All three people had attended the same social gathering before the attacks.Authorities suspect a drug cartel carried out the crimes but offered no motive Drug gang violence has made Juarez one of the deadliest cities in the WORLD . Last year alone, more than 25-HUNDRED people were murdered.(STANDUP: Whit Johnson/CBS News/Washington) :48-:58PRESIDENT OBAMA QUICKLY CONDEMNED SATURDAY'S KILLINGS . THE RECENT WAVE OF VIOLENCE ALSO PROMPTED THE STATE DEPARTMENT TO AUTHORIZE GOVERNMENT EMPLOYEES TO SEND THEIR FAMILY MEMBERS OUT OF SOME PARTS OF MEXICO.(nats:)The deaths of the three people with ties to the American consulate occurred during an especially bloody weekend in Mexico. Roughly 50 people were killed in apparent gang violence. More than half died in the tourist hot spot of Acapulco -- four of them beheaded.(nats:)Since President Felipe Calderon declared war on the cartels in 2006, nearly 19,000 people have died in drug violence. Many of those have been rival drug traffickers and police but the fear now is as violence continues to escalate.... so will the number of innocent victims.Whit Johnson, CBS News, Washington.