Sunderland are preparing a £15 million bid for Fenerbahçe striker Moussa Sow according to the Mirror.
The Daily Star recently reported that the Black Cats had made a £12.5 million offer for the Senegalese international.
The report claims that Fenerbahçe president Aziz Yıldırım wants at least £14 million for the experienced striker.
Sow has also attracted interest from fellow Premier League outfit West Ham over the summer transfer window.
The Express report that the Hammers are preparing a £12 million bid for the 29-year-old striker. West Ham boss Slaven Bilic is familiar with the 29-year-old striker having having been in charge of fellow Süper Lig outfit Beşiktaş for two seasons.
Sow scored 16 goals and provided eight assists in all competitions for the Yellow Canaries last season and still has another year left on his contract wroth €1.4 million.
The experienced striker has won silverware wherever he has played including the Ligue 1 with Lille in 2011 and the Süper Lig at Fenerbahçe in 2014.