Radiohead fans are on the lookout for signs of the band's forthcoming album, following the announcement of a world tour and speculation around their registration of two new companies, Dawn Chorus LLP and Dawnnchoruss Ltd. This morning, several UK fans received an eerie, mysterious update via post: Reports have emerged of leaflets reading, "Sing a song of sixpence that goes/Burn the Witch/We know where you live," with an embossed Radiohead logo, via Twitter and Reddit users who say they have previously made orders from the group. "Burn the Witch" is the name of a Radiohead track thought to have originated around 2003-2005; below, you can hear two, very brief snippets of the intro, and check out the leaflets.

Pitchfork has contacted the band's representatives for comment.

Read "19 Unreleased Radiohead Songs That Could Be on Their Next Album" on the Pitch.