BirminghamLive counters that claim, saying that West Ham would be looking for at least double the £10m mentioned in the recent claims.
However, Moyes has previously suggested Diangana has a part to play in his West Ham plans next season.
Moyes told Football.London earlier in January, when asked if Diangana has a part to play next term.
“I’d like to have a really new, young team. Having them around would be good. We think Grady has got something as well.”