According to The People the bid was turned by Leeds but they may come back with a higher offer.
Viduka is on a reported £67k-a-week with Leeds but he is seen as a cheaper option than Fulham's Louis Saha or West Ham's Jermaine Defoe.
Chief Executive David Gill, club solicitor Maurice Watkins and team boss Sir Alex Ferguson are all shocked by the Rio Ferdinand decision and feel a move into the transfer market could lift things up at Old Trafford.
Meanwhile, Viduka is facing a gruelling 12-hour trip back from Venezuala just two days before Leeds are due to meet Manchester United at Old Trafford on February 21st.
The Socceroos have arranged a friendly for their European-based players in Caracas on February 18th and Viduka will be expected to be called up by coach Frank Farina.
The Socceroos have arranged a friendly for their European-based players in Caracas on February 18th and Viduka will be expected to be called up by coach Frank Farina.