The striker's goal-scoring ability would be welcomed by Bolton Wanderers to relieve pressure on top scorer Gary Madine.
West Ham in talks, Cardiff have bid rejected and Everton feature twice.
HITC Sport understands Cardiff City have made a new bid for Bolton star.
Bolton Wanderers' star man Gary Madine is attracting plenty of attention from Championship rivals with Sunderland, Cardiff and Hull City all interested.
Leeds desperately need to sign a striker if they are to maintain their Championship promotion hopes.
Sunderland are hoping to nab Gary Madine from their Championship relegation rivals Bolton Wanderers but Cardiff City have made the first move.
Sunderland are reportedly interested in signing striker Gary Madine from Championship relegation rivals Bolton Wanderers in the January transfer window.
Sunderland's star man could be sold by his parent club in January.
Sunderland are said to be keen on Gary Madine, while Leeds United, Derby County and Sheffield Wednesday have been credited with interest in Josh Vela.
Sunderland are said to be interested in the Bolton Wanderers forward in January.
Derby County, Ipswich Town and Cardiff City forwards are among those that closely follow Tottenham Hotspur loanee Grant Ward as the Championship's pre-season top goalscorer.
Sheffield Wednesday striker Gary Madine has joined Blackpool on loan.
Sheffield Wednesday striker Gary Madine has admitted where team mate Stevie May excels.