SEABROOK, N.H. (AP) — An ammonium hydroxide spill of less than a gallon in a stockroom at New Hampshire’s Seabrook power plant has required the plant to declare an “unusual event,” the lowest of four emergency categories.

Plant spokesman Al Griffith says the spill happened about 1:45 p.m. Wednesday inside the administration building. He says there are no injuries and no danger to the public.

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It’s not clear how the spill happened. Cleaning materials are kept in the stockroom.

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The building is in a protected area.

Plant operations have not been affected.

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