BUCHANAN - The Indian Point Energy Center tested its emergency siren system earlier today.

The sirens near the nuclear plant sounded for four minutes just after 10:30 a.m. and could be heard in Westchester, Rockland, Putnam, and Orange counties.

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Officials say all 172 of the sirens sounded successfully.

The plant generates as much as 30 percent of the electricity used in New York City and Westchester County.