MANCHESTER, N.H. --

Firefighters in Manchester were called to a fourth suspicious fire in six days Wednesday.

Fire investigators said a fire at a large garage on Union Street was intentionally set. Several vehicles were damaged in the fire; no injuries were reported.

Since last Friday firefighters in the Queen City have battled fires that gutted an abandoned apartment building and damaged a business and a car. All are believed to have been set intentionally.

Investigators said there is no evidence that the fires are connected. An investigation is ongoing.

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