Sunderland boss Martin O'Neill is coy over his interest in a new striker signing.
Wolves forward Steven Fletcher and Manchester City youngster John Guidetti are both on O'Neill's radar.
O'Neill said: "I don't think it's right of me to publicise what we're trying to do at this minute. We have made a number of bids for a number of players right now, and we're still waiting to hear back.
"All I can tell you is that we're in a position to strengthen."