Fire at Wisconsin anti-abortion office investigated as arson, police say

Arson investigators were probing a fire Sunday inside the headquarters of anti-abortion group Wisconsin Family Action, where someone had spray-painted a message outside the building.

Madison police spokeswoman Stephanie Fryer told the Wisconsin State Journal that the fire reported shortly after 6 a.m. Sunday in Madison was suspicious in nature. Federal officials and the Madison Fire Department are helping with the investigation.

No one was injured, and officials were still working to determine how much damage the fire caused. Police told CBS News in a statement that arson investigators are working with fire department officials to determine an exact cause.