Red Bull chief Christian Horner has allayed fears his team could quit Formula One by insisting they are "committed" to competing in 2016.

The four-time constructors' champions have been at the centre of a drawn-out row with engine supplier Renault over their poor performance this season.

Relations between the two parties became so fraught, Red Bull co-founder Dietreich Mateschitz threatened to withdraw the team if a competitive engine could not be found.

But speaking to BBC Sport ahead of the penultimate race of the season in Brazil, team principal Horner commented: "We are committed to being in F1 next year and in the future.

"We are working hard to put together as competitive a proposition as possible."

Reports suggest Red Bull could even come to a new agreement with Renault that would see them continue to use engines supplied by the French manufacturer.

"I would hope by the close of the season we'll be in a position to announce what our plans are," added Horner.