BOSTON (WHDH) - The Boston Parks and Recreation Department is dealing with an invasive beetle that has been detected in the city.

Emerald ash borers kill ash trees when their larvae burrow under the bark and feed on the nutrients that circulate inside the tree, according to the department.

Some ash trees in Boston have started displaying signs of infestation.

The department is working to remove sick trees and protect healthy trees in an effort to stop the spread of the beetles.

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