WASHINGTON — U.S. Park Police are investigating a second case of vandalism on the National Mall.

Police say green paint has been found on the statue of Joseph Henry outside the headquarters of the Smithsonian Institution. Henry was the Smithsonian's first secretary.

Police spokesman Sgt. Paul Brooks says the vandalism was reported on Friday, the same day that green paint was found splattered on the Lincoln Memorial. Brooks says the incident is under investigation, and it's not clear whether it was the same paint that was used on the Memorial. He says it appears that something was intentionally drawn on the statue. The Lincoln Memorial had nothing drawn on it, just splattered paint.

The Lincoln Memorial has reopened to visitors, and crews are working to remove the paint.