Bernie Ecclestone says he is none the wise over whether Red Bull Racing will continue in Formula 1 next season following reports its last chance for an engine deal has been scuppered.

According to Auto Motor Und Sport, Ferrari has withdrawn its deal of a supply for the 2016 season after Red Bull rejected its original offer of a 'lesser' specification engine also given to Haas and Sauber, and Ferrari refused to offer factory-standard specification over fears it would arm a key rival.

With Ferrari seemingly Red Bull's last obvious chance of an engine supply, the Austrian company's threat of withdrawing its four-time world championship winning team now appears increasingly likely.

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Indeed, despite some intervention from Bernie Ecclestone - who is particularly eager for the outfit to stay in F1 - over the matter, he says he remains in the dark about Red Bull's intentions and whether further discussions are going on behind the scenes.

"I don't know, honestly. I think enough has been said about these engines I don't want to make any comments," he told Sky Sports

Even so, he does offer up some hope by declaring 'it's been cleared up' without explicitly explaining what he is referring to.

"I think it's been cleared up, whatever they're going to have. I haven't spoken to Dietrich Mateschitz, [but] he knows what he's doing."