Thom Yorke of the band Radiohead performs during the All Points West Concert August 8, 2008 in Jersey City, New Jersey. REUTERS/Keith Bedford

There is speculation that Radiohead will issue a new digital EP as early as Monday, after the leak of a track online assumed to be a new song by the band.

Fan site At Ease reports that the track These Are My Twisted Words was posted on its message board, and it has since appeared on YouTube. According to At Ease, the source file includes the title Wall of Ice -- assumed to be the name of the EP -- and the release date August 17.

Radiohead, which does not have a long-term label deal at present, released its 2007 set In Rainbows via its own Web site on a pay-what-you-want basis for the MP3 and followed that with a full release in January 2008 via XL Recordings in the U.K and ATO/Red in the U.S.

In an interview with the Australian Friday, multi-instrumentalist Jonny Greenwood said: Traditionally we'd be looking for 10 or 11 songs and putting them together, but that doesn't feel as natural as it used to, so I don't know what we'll do. Maybe we'll find four songs that work together and we'll call that a release. I don't know. No one knows how to release music any more, including us. How to put it together, in what format, how long. We're in the dark as much as anyone, I think.

Radiohead is rehearsing for festival appearances including Leeds and Reading (August 29 and 30) in the U.K.

Last week it issued the digital track Harry Patch (In Memory Of), with proceeds going to the British Legion, the U.K. charity that supports the armed forces and its veterans. Harry Patch, who died aged 111 on July 25, was Britain's last surviving veteran of World War I.