Sheriff-patrolThe FBI is involved in the investigation of equipment fires at a Bakken Oil construction site in central Iowa’s Jasper County.

More equipment was damaged by fire late Saturday night, at the same location where equipment was damaged by similar fires about three months ago. Officials say the fires could be due to arson. In this weekend’s incident, a backhoe and two bulldozers were damaged.

In August, police said they suspected vandals set fire to pipeline construction equipment on the same rural Reasnor property owned by Cris Merten, as well as sites just outside Newton and Oskaloosa. Those fires caused an estimated $1 million in damage. No arrests have been made.

Reporting by Randy Van, KCOB, Newton