Sunderland target Diafra Sakho won't be going anywhere until a replacement has arrived, Hammers officials have confirmed.
Crystal Palace, Watford, West Bromwich Albion and Sunderland are all understood to be tracking the striker, who is looks set to leave West Ham this summer.
The striker, subject of a failed £11million transfer bid by Sunderland back in June, handed in a transfer request earlier this month.
David Sullivan, Hammers' co-chairman, has reiterated the club's stance on the striker - who is reported to have refused to travel with the West Ham United squad on their tour of Austria.
"He is not for sale until we get players in," Sullivan told the Daily Mail.
"Until we bring strikers in we simply cannot let strikers go.
"James Tomkins was different because we had a surplus in the centre-half department.
"But until we get at least a couple of strikers we can’t let any forward go."
Click here for the very latest on the situation surrounding Sunderland, England and Big Sam.
Sunderland, meanwhile, are yet to make a single summer signing ahead of the new campaign.
But we revealed today that a ‘number 10’ attacking midfielder is among a trio of positions that Sam Allardyce has prioritised, IF he remains as Sunderland manager.
It has been well-documented that a new striker and right-back have been at the top of Allardyce’s list, with only one available option currently on the books in each position.
But Allardyce also wants a player capable of operating in the hole behind the striker, with those three positions forming the basis of Sunderland’s main transfer hunt.
And finally, William Hill have revealed the latest England manager talks as the FA continue discussions with those managers on their shortlist.
Hull City boss Steve Bruce is the latest to be interviewed for Roy Hdgson's old job, following FA talks with Big Sam last week.
“Steve Bruce has moved into peripheral contention, however, Sam Allardyce is the runaway leader in this race according to the odds and it looks highly likely that an announcement could be made this week,” said William Hill spokesman Joe Crilly.
Next permanent England manager:
1/6 Sam Allardyce;
8/1 Steve Bruce;
10/1 Jurgen Klinsmann;
16/1 Eddie Howe; 33/1 BAR
Will the new England manager be appointed before midnight on Sunday: