Crews originally thought to have found a few dozen cannonballs, but that quickly escalated to hundreds as the unearthing process began.
Leonello said there's black powder in the cannonballs, which he says can be dangerous.
A Maryland-based company specializing in handling explosives is removing the cannonballs over the next few days.
Leonello adds that all parties involved are taking every precaution they can to ensure their safe removal, although he says the likelihood of one exploding is slim.
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