The newly promoted Premier League club submitted a successful bid to the Fir Park outfit after monitoring Turnbull's situation with Celtic.

They matched an offer of £3m plus £250,000 in add-ons from Celtic that Motherwell accepted last week.

But the 19-year-old and the Scottish champions could not reach an agreement over personal terms.

Celtic released a statement on Friday to say the "magnificent" offer made to Turnbull had not been accepted.

And it now looks less likely the Scotland Under-21 player, who scored 15 goals for his boyhood club last season, will join Neil Lennon's side.