West Brom have denied giving Peter Odemwingie permission to talk with QPR despite him arriving at Loftus Road in an apparent bid to force a move.
The striker, 31, was the target of an unsuccessful R's bid of about £3m last week and has put in a transfer request.
"Albion would also like to make clear that Peter has not been given permission to speak to QPR," read an Albion statement.
"Talks [between QPR and WBA on a fee] have so far proven fruitless."
QPR have denied that Odemwingie was admitted to club premises.
Odemwingie had earlier appeared optimistic that a deal could be reached.
"I hope they will be happy with what they get and, of course, they want to get in players themselves. I just hope that everything will be sorted out in the next few hours," Odemwingie told Sky Sports News on his arrival in West London.
He has also been quoted as saying that he had reached an informal agreement with Albion's technical director Dan Ashworth on his departure, only to find that the situation had changed when he was en route to London.
"I am disappointed this is all happening. I met with Dan Ashworth this morning and we shook hands that I could leave with his blessing if the £3.5m fee was met," the striker was quoted as saying by the Daily Mirror.
"Now, as I am on my way, I find that there are more complications. It is frustrating to say the least. But I am hopeful a solution can be found."
QPR manager Harry Redknapp confirmed earlier in the day that Odemwingie was still a player he would like to bring into his squad.
"He's got pace, I really like him and I think he could help us," he told the the club's official weekly phone-in show 'London Call-In'.
"Whether we can get him, I'm not sure."
West Brom had described Odemwingie's transfer request club as "disappointing" earlier in the week.
"As we have repeatedly stated, we have no need or desire to sell our core players," said Baggies technical director Richard Garlick at the time.
"Since we turned down Peter's transfer request, he has made his position clear in a statement to the media and via his personal Twitter account. (external) This matter will be dealt with internally."
Odemwingie, a £2.5m signing from Lokomotiv Moscow in 2010, tweeted on Sunday night: "Looked through my tweets. Deleted some. Was too much. Only excuses - home alone, dark, son and wife in hospital, frustrated."
His deleted tweets included: "Last season January window is when I should have handed in transfer request. Was one foot in Rubin Kazan - not for sale. Fulham. Not for sale. Newcastle. Not for sale. Wigan. Not for sale."
Last week he had said he was "deeply hurt" and "offended" by what he regarded as a lack of "common respect" from the West Brom management.