Homeland Security agents are reviewing more than 15 apparent attacks on Milford, NJ water and sewage facilities since summer that, in some instances, shut down water service and caused sewage overflows into the street.

The saboteurs have shut off power to water systems, opened valves meant to be kept shut and thrown a plank of wood into a sewage filtration system, according to Kelly Love, administrator for the Milford, NJ Municipal Utility Authority. 

The sabotage, which began in July, has caused residents in at least 60 homes to lose water pressure three times and resulted in numerous sewage spills, said a NorthJersey.com report. In the latest incident, says the report, sewage poured into the street after someone interfered with the switches for the pumps.