A fourth arson fire has hit the town of Cambridge since late March.
Deputy State Fire Marshals are investigating the multiple fires the last of which occurred on Friday night involving a two-story vacant home on Fairmount Avenue.
The first fire on High Street set on March 20th also involved a two-story single-family home causing $90-thousand worth of damage.
Two other fires were set on March 26th involving a similar type of structure one located on Cross Street and another on Cedar Street.
