(CBSNews.com) - Green paint was splattered overnight on parts of the Lincoln Memorial in Washington, D.C., U.S. Park police say.
They say a patrol officer found green paint splashed on the floor near the famous statue of President Lincoln, and some on the base of the statue, at around 1:20 a.m. local time.
The memorial, on the National Mall, will be closed until the U.S. Park Service can clean it up.
An investigation is under way.
CBS Washington affiliate WUSA-TV says its crew members got as close as they could to the statue and didn't see the paint, but saw evidence of the Park Service activity.
The station says investigators will review video from surveillance cameras to help determine who carried out the vandalism.
© 2013 CBS Interactive Inc. All Rights Reserved.