Brisbane Lions coach Michael Voss will leave immediately after the club made what it described as an ''incredibly difficult decision'' to remove him as senior coach.

Assistant coach Mark Harvey is expected to coach out the club for the remaining three games of the season - the second time he has been a caretaker, having taken over when Chris Connolly was sacked at Fremantle - but speculation about Voss' replacement immediately shifted to former Sydney premiership coach Paul Roos, who was approached about the Lions job about a month ago.

Sources close to Roos said he has not signed with the Lions yet.

''The board has agreed on a process moving forward to identify a senior coach and we'll be saying more about that over coming days,'' said Lions chairman Angus Johnson.