This was in a bid to calm accusations that it had seized power in a military coup.
The country's longtime president Blaise Compaore stepped down last week after two days of mass protests over his bid to extend his rule. On Saturday, the military appointed Lieutenant Colonel Zida in a move criticised by opposition politicians and Western powers seeking a return to civilian rule.
(READ MORE: Army officer takes charge in Burkina Faso, ousting general)
"Our understanding is that the executive powers will be led by a transitional body but within a constitutional framework that we will watch over carefully," he told a gathering of diplomats in the capital Ouagadougou, without giving a timeframe.