Sirens activated in Exeter Friday morning did not pertain to the Seabrook Station nuclear plant.

The alerts came from Philips Exeter Academy, which is broadcasting the message over a loud speaker as part of a planned drill, according to New Hampshire Homeland Security and Emergency Management. The messages were heard beyond campus.

Exeter is located within the 10 mile Emergency Planning Zone around Seabrook Station.

Exeter Police posted a warning on their Facebook page that PEA would be using the speakers on Friday at 10:05 a.m.

The messages caused concern on social media after nine of 121 sirens for Seabrook Station went off on Tuesday with a message to evacuate the beach. The sirens went off "inadvertently", and the cause remains under investigation by operator NextEra Energy Seabrook Station.

Looking for Answers

Sen. Jeanne Shaheen sent a letter to NextEra urging them to not only fully investigate what caused the sirens to go off, but communication between the plant, New Hampshire Homeland Security and Emergency Management, local police and fire officials.

“I hope you will do more to reassure the public that an incident like this will not happen again and you will reach out to state and local leaders to share more information about how you will improve upon this going forward," Shaheen wrote.

Contact reporter Dan Alexander at or via Twitter @DanAlexanderNH

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