Iranian Foreign Ministry Spokesman Seyyed Abbas Mousavi has strongly denounced a US spy drone's intrusion into the Iranian airspace, warning the aggressors about the consequences of such acts.

"While expressing our strong protest at such acts of aggression and provocative moves, we announce that we firmly warn against any aggression and illegal entry into the country's airspace by any foreign flying object, and any aggression against the territory of the Islamic Republic of Iran and violation of its frontiers, and the entire responsibility for consequences of such actions fall upon the aggressors," Mousavi said in a Thursday statement.