TEHRAN, Dec. 31 (Xinhua) -- Fresh U.S. sanctions against the Islamic republic violate "goodwill principle" of the country in its interaction with Iran, the Foreign Ministry Spokeswoman Marzieh Afkham said here on Wednesday.

"Such a move by the United States is an obvious violation of its goodwill principle and casts doubts on its goals" in interacting with the Islamic republic, Afkham told reporters in her weekly press briefing.

The U.S. on Tuesday slapped sanctions on nine persons and entities for their alleged role in helping the Iranian government evade sanctions and supporting its human rights abuses.

The Department of Treasury said the administration, while opposing any new nuclear-related sanctions imposed on Iran during the ongoing negotiations over a comprehensive nuclear deal, remains committed to enforcing existing sanctions against the Islamic republic.

"The U.S. sanctions are totally political and propagandistic and they result from the U.S. domestic policies," Afkham said.

"The sanctions will have no impact on the will of the government and its commitments vis-a-vis Iranian nation, and we will continue our efforts to provide our needs," she added.

Iran is already under sanctions by the UN Security Council as well as unilateral embargoed by the U.S. and the EU on the country's energy industry and financial system.