Scouts have been flocking to Easter Road recently to catch a glimpse of the highly rated pair in action, with striker Riordan in particular earning rave reviews for his performances in the SPL this season.
Defender Murray is also of high interest to a number of clubs, with the Old Firm duo Rangers and Celtic having lodged a strong interest in recent weeks.
West Ham United, Tottenham Hotspur and Fulham are also interested in securing the services of Riordan, who is rated in the £1,000,000 bracket by Tony Mowbray's team.