People in Willow Lake, South Dakota, are urged to keep an eye out for suspicious activity near power lines and electricity substations.
Nortwestern Energy believes someone was shooting at electrical equipment and that's what caused recent outages that affected Willow Lake, Henry and other nearby communities.
Linemen who were making repairs found damage that appears to be from bullets or pellets.
Anyone who sees suspicious behavior or has information regarding the vandalism should call police.
