Borussia Dortmund has reacted angrily to Bundesliga rival Bayern Munich's attempts to lure star forward Marco Reus.

Bayern chairman Karl-Heinz Rummenigge recently told various German media that Reus has a buyout clause in his contract with Dortmund, which runs out in 2017. Rummenigge has said the player could leave Dortmund next year for a set fee of €25 million ($33.46 million), about half of his estimated market value.

Dortmund's chief executive Hans-Joachim Watzke says his club has noted with a "certain anger" Rummenigge's statements that will "damage the already tense relations" between the two Bundesliga giants.

Bayern exploited such clauses to lure Mario Goetze from Dortmund one year ago and then signed striker Robert Lewandowski when his contract with Dortmund expired at the end of the season.