HYANNIS, MASS. (WHDH) - A Cape Cod man set fire to an excavator and two mobile offices at the under-construction Hyannis Fire Department headquarters site, Barnstable police said.

Officers responding to High School Road just before 12:30 a.m. after receiving two 911 calls found an excavator fully engulfed in flames. A second fire was also found burning under a mobile construction office and a third under a second separate office, all on the same site, according to officials.

Hyannis fire is slated to move into the new headquarters in September.

During an investigation, officers encountered Allen Beckwith, 25, of Falmouth, trespassing within the fenced-in construction site, police said.

Hyannis firefighters extinguished the flames and no injuries were reported.

Investigators concluded that Beckwith entered the site, broke into a storage container and set fire to the offices and excavator, a police report indicated.

Beckwith was arraigned Wednesday on three counts of arson, one count of breaking and entering in the nighttime to commit a felony, a trespassing charge and a probation warrant.

He has at least four other cases pending in various courts on the Cape and police say he wearing a GPS bracelet when he was arrested.

The incident is under investigation.

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