Someone scaled a barbed-wire fence and hung a "White Power" banner on a water tower behind Mount Pleasant High School earlier this week.

State police in Greensburg said someone cut through barbed wire on top of the fence surrounding the tower owned by the Municipal Authority of Westmoreland County before climbing the structure. Whoever climbed the tower then hung a Confederate flag and a banner saying "White Power," police said.

Police believe the banner was hung sometime between 9 p.m. Saturday and 6 a.m. Monday. The Joint Terrorism Task Force consisting of federal, state and local agencies in Southwestern Pennsylvania is investigating, state police said.