The story

A potentially deadly new strain of the swine flu virus cropped up in more places in the United States and Mexico on Saturday, in what the World Health Organization called "a public health emergency of international concern."

The most recent reports Saturday afternoon were of two confirmed cases of the virus in Kansas -- bringing the number of confirmed U.S. cases to 11.

Those joined nine confirmed cases in Texas and California and an apparent outbreak at a private school in New York City, where officials say eight children likely have the virus.

By Saturday night, health officials in Mexico said 81 deaths there were "likely linked" to the swine flu.

Dr. Jose A. Cordova Villalobos, Mexico's Secretary of Health, said viral testing has confirmed 20 cases of swine flu across the country. Read full article »

CNN's Mayra Cuevas, Ann Curley, Caleb Hellerman, Elaine Quijano and Susan Candiotti contributed to this report.

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