A missile that the U.S. Department of Defense says is confirmed as a "Qiam" ballistic missile manufactured in Iran and that the Pentagon says was fired by Houthi rebels from Yemen into Saudi Arabia on July 22, 2017 is seen on display at a military base in Washington, U.S. December 13, 2017. (Reuters photo)

TEHRAN, Dec. 1 (Xinhua) -- Iranian defense minister on Saturday denied that the Islamic republic is supplying arms to Yemen Houthi militants.

"The Americans are falsely accusing Iran of supporting the Yemenis (Houthis) militarily," Brigadier General Amir Hatami was quoted as saying by Tasnim news agency.

"They (the Americans) think the Yemeni people's resistance is because of Iran's support, but our support is spiritual," the defense minister said.

What leads to victory is the spirit of resistance of the nations who are not willing to give in to the oppression of the United States, he added.

Part of a wind bolt cover that the U.S. Department of Defense says is confirmed as a "Qiam" ballistic missile manufactured in Iran and that the Pentagon says was fired by Houthi rebels from Yemen into Saudi Arabia on July 22, 2017 is seen on display at a military base in Washington, U.S., November 29, 2018. (Reuters photo)

Iranian Foreign Minister Mohammad Javad Zarif on Friday announced Iran's four-point plan to end Yemen crisis.

"War on #Yemen must be stopped. We urge ceasefire, humanitarian assistance, intra-Yemeni dialogue & establishment of broad-based government," Zarif tweeted on Friday.

The military conflict in Yemen began with the 2014 takeover of the capital of Sanaa by the Shiite Houthi rebels supported by Iran, which forced Yemeni President Abd-Rabbu Mansour Hadi into exile.

The Saudi-led coalition allied with the government has been fighting the Houthis since 2015.