The Wales outfit are currently second in the Championship and looking for front line reinforcements in their bid for promotion to the Premier League.
And ClaretandHugh understands there is interest in Sakho at around £12 million although should the Senegal striker choose to make the move he will face a rigorous medical examination after his various injury problems.
The Hammers will be ready to sell assuming that boss David Moyes gives such a move his seal of approval and the cash would go straight into boosting his own transfer kitty.
Rennes – who were at the centre of the summer pantomime when the striker arrived in France for a medical but was forced to remain at West Ham – are still keen.
Sakho has not had the game time he would have hoped for at the Hammers since then and is understood to be ready to move on as he bids to kick start his career.