Police are calling a fire that damaged a church in Massachusetts early Tuesday morning suspicious.
The fire broke out around 3:30 a.m. at the Riverside Church on Groveland Street in Haverhill.
The ATF has now joined the investigation and the FBI is helping, as well.
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The church's pastor thinks it was intentionally set. He told the Eagle-Tribune that investigators found an accelerant poured along the side of the building.
Firefighters managed to put out the fire, but it damaged a wall of the building.