Aberdeen have revealed Derek Young, David McNamee and Mark Howard will leave the club at the end of the season.
Craig Brown has issued ultimatums to seven members of Aberdeen's first-team squad over their expiring contracts.
Mark McGhee has confirmed Derek Young could be used in a swap deal before the transfer window closes.
Derek Young has signed a contract extension that will keep him at the club until the summer of 2011.
Celtic moved to the top of the table with a 3-0 win over Falkirk, while Hamilton lost their 100 per cent record at Kilmarnock.
Aberdeen fought back from a goal down to hold Rangers to a 1-1 draw at Pittodrie.
Aberdeen boss Jimmy Calderwood fears Jamie Smith and Derek Young could miss the rest of the season through injury.
Aberdeen have been hit by a major injury blow after forward Derek Young was ruled out for an additional six weeks.