Burkina Faso's army says it has arrested a former high-ranking minister who served under the country's now-ousted president of nearly 30 years.

Former Foreign Affairs Minister Djibril Bassole denies the allegations that he supported the military general behind this month's failed coup.

The government accuses Bassole of joining forces with Gen. Gilbert Diendere and alleges the two have sought help from foreign forces.

Bassole replied late Monday by calling it a "demonization campaign" against him.

While coup leader Diendere quickly handed power back to the civilian transitional government, efforts to disarm his supporters have stalled.

Bassole, a high-level diplomat, has long been a part of hostage negotiations in West Africa and also served as the U.N. special representative in Sudan's restive Darfur region.