[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/images/03/08/art.alfranken.0308.gi.jpg caption ="Police are looking into damage to Al Franken's home."](CNN) – A window in Sen. Al Franken's Minneapolis residence was damaged by what could have been a pellet or BB fired from a gun, according to the Minneapolis Police Department.
Sgt. Bill Palmer of the Minneapolis Police Department told CNN that members of the Franken family recently reported finding a hole in a window of their Minneapolis condominium that appeared to be made by either a BB gun or small rock.
The hole damaged a double-paned window, but did not penetrate the second pane, Palmer also said.
The object in question was not found and it remains unclear exactly when the damage occurred. Palmer said that it is unlikely the possible BB shot was directed at the Minnesota Democrat.
"I find it unlikely people actually even know where the senator lives," Palmer said.
Marc Kimball, a spokesman for Franken, added the matter is under investigation by both the Minneapolis Police Department and the U.S. Capitol Police and said, "It happened when they were not home."
A spokesperson for the U.S. Capitol Police did not return CNN's request for comment.