Gunmen Attack Mexico Rehab Center, at Least 10 Die

In Ciudad Juarez, meanwhile, the death toll from a birthday party massacre late Friday rose to 14 when an 18-year-old man died of his wounds.

Nineteen people were wounded in the attack on two private homes where about four dozen partygoers had gathered for a teenager's birthday.

The dead identified so far were 13 to 32 years old, and the majority of the victims were high school students, a survivor said.

While investigators said they have not yet identified the perpetrators or a motive, police found 70 bullet casings from assault weapons typically used by drug gangs at the scene of the shootings. Cartel violence has killed more than 2,000 people so far this year in the city, which is across from El Paso, Texas.

Drug gangs have increasingly attacked private parties they believe members of rival gangs might be attending; innocent partygoers are often killed in such attacks.

On Sunday, prosecutors in northern Chihuahua state, where Ciudad Juarez is located, said they were searching for a man known only by his nickname, "The Mouse," who was apparently the target of the gunmen.

The man was reportedly wounded in the Friday shooting, but has disappeared. Investigators said they believe he can provide information on who was trying to kill him.

Memorial services were held Sunday for some of the victims of Friday's attack, and prosecutors said guards had been provided to protect the services.

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