Mayor Michael Bloomberg says an al-Qaida sympathizer who plotted to bomb police and post offices in New York City has been arrested.

Bloomberg announced Sunday the arrest of 27-year-old Jose Pimentel on numerous charges.

Pimentel was arrested Saturday. He is accused of having an explosive substance that he planned to use against others and property to terrorize the public.

The New York Police Department's Intelligence Division was involved in the arrest.

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Associated Press writer Colleen Long contributed to this report from New York.