Ras - "Lying, accusing and spreading hatred are key elements of US foreign policy, specially in the current regime," Mousavi said on Thursday.
He described the US allegations as baseless, saying, "Americans who feel they have not succeeded in extending Iran's arms embargo in the international arena and the UN Security Council, are trying to use allegations and lies as an excuse to continue to exert maximum pressure and advance their vicious goals."
Mousavi said that the US and Saudi Arabia have imposed a five-year siege on the Yemeni people, killing thousands due to starvation and malnutrition, and added, "Instead of being held accountable for their crimes in Yemen, the two regimes are trying to absolve themselves of responsibility and accountability for their inhumane and criminal behavior by making baseless accusations against others."
Iran has in several occasions dismissed allegations about supplying weapons to Yemen's Ansarallah resistance group.
"All that glitters is not gold and any similar weapon is not necessarily an Iranian weapon," Mousavi said in February.
"Medicine and medical goods are sent to them (the Yemenis) with difficulty; then how could military equipment go through and sent to them?" he asked.
Mousavi said that the Yemeni nation has made astonishing progress in the military field and manufacturing weapons and military equipment after facing the Saudi-led aggression.
Saudi Arabia and a number of its regional allies launched a devastating campaign against Yemen in March 2015, with the goal of bringing the government of former president Abd Rabbuh Mansour Hadi back to power and crushing the Ansarallah movement.
The US-based Armed Conflict Location and Event Data Project (ACLED), a nonprofit conflict-research organization, estimates that the war has claimed more than 100,000 lives over the past nearly five years.
The UN says over 24 million Yemenis are in dire need of humanitarian aid, including 10 million suffering from extreme levels of hunger.