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The Boston Globe

Metro

Rats swarm Castle Island in South Boston

For centuries, Castle Island stood as a bulwark against foreign invaders. But these days, the popular South Boston park is battling domestic intruders: rats.

“They’re overwhelming; it’s infested all over the island,” said Bill Spain, president of the Castle Island Association, a nonprofit historical preservation group. “It’s really bad at night. Someone is going to get attacked.”

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