New Jersey health officials say they haveidentified five probable cases of swine flu in people who recentlytraveled to Mexico and California.

The New Jersey Department of Health and Senior Services said Monday that all have mild forms of the flu and none have been hospitalized.

The department says it's arranging for confirmatory testing at the federal Centers for Disease Control and Prevention.

Health Commissioner Heather Howard has said that given New Jersey's proximity to New York and diverse population, the outbreak was expected to reach across the Hudson River.

However, Howard says the state is well prepared, having already stocked up on Tamiflu, the medicine used to treat influenza. She says the state has also increased surveillance of influenza cases and has state testing labs ready to deal with increased volume.

The U.S. government declared a public health emergency on Sunday because of the swine flu, which has sickened people in New York, Kansas, California, Texas and Ohio. On Monday, New York City Mayor Michael Bloomberg announced that 28 students at a private Catholic school in Queens have contracted swine flu, and another 17 cases at the school are probable.

Many of those sickened had recently visited Mexico.

AP wire services contributed to this report

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