Graffiti at the Lincoln Memorial (Photo courtesy of the National Park Service)

Authorities say they found graffiti spray painted at two sites on the National Mall early Tuesday morning, and they are searching for suspects.

Crews are working to remove a message that appears to read “fuck law” on the Lincoln Memorial, according to a release from the National Park Service. They are also removing “undecipherable vandalism” that was spray painted on a Smithsonian sign in the 1400 block of Constitution Avenue.

The Lincoln Memorial is one of several sites on the National Mall that was tagged with messages espousing conspiracy theories over President’s Day weekend.

Officials said that Tuesday’s graffiti was discovered around 4:30 a.m. They did not say if they believe the two incidents were connected.

The U.S. Park Police is currently investigating the incident—anyone with information can call them at 202-610-7515.