Andy Carroll is set to miss even more of the season than initially anticipated having suffered a new foot injury in training, potentially four months, reports the Daily Mail.
The powerful striker was just returning to training following a similar foot injury over the summer but limped out of the session.
The Hammers' record signing is yet to feature after having his loan deal from Liverpool made permanent in the summer.
If the England striker is out for four months it will mean he will be out for nearly half the season.
West Ham released a statement on the club website: "West Ham United can confirm Andy Carroll suffered an injury to his right foot during his return to full training today.
"Although it is in the same part of his foot as his previous injury, it is a new injury and therefore there will be no prognosis until he has seen a specialist.
"whufc.com will provide a further update when the relevant information is available."
This is the latest in a string of injuries that have been hampering the 24-year-old's development.
When Liverpool smashed their transfer record in spending £35million to lure Carroll from Newcastle United, it took over a month for Carroll to make his debut.
His Anfield career was then hampered by further injuries and poor form before he was sent out on loan to Upton Park last season where he managed 24 appearances.
Despite transfer fees which have totalled in excess of £50million in Carroll's career so far, he has only featured nine times for England scoring two goals.
On his eventual return from injury it will be a race against time to convince Roy Hodgson of his worth of a World Cup call up should the Three Lions qualify.
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