US President Donald Trump on Monday said he had imposed a 25% tariff on goods from countries with commercial ties to Iran, a move that could put pressure on Tehran as anti-government protests enter a third week.

Trump stated on social media that the tariff was effective immediately but did not clarify what it means to be doing business with Iran.

China is Iran's largest trading partner, followed by Iraq, the United Arab Emirates, Turkey, and India.

This new tariff follows Trump’s previous threats of military intervention should Tehran harm protesters. White House spokeswoman Karoline Leavitt indicated that military options, including airstrikes, are still being considered.

Any Country doing business with the Islamic Republic of Iran will pay a Tariff of 25% on any and all business being done with the United States of America, Trump wrote on Truth Social. This Order is final and conclusive, he added.

The specifics regarding which countries' imports will be affected have not been disclosed by the White House.

Protests erupted following the drastic decline in the value of Iran's currency, the rial, which has become a crisis of legitimacy for Iran's Supreme Leader, Ayatollah Ali Khamenei. Reports suggest nearly 500 protesters and 48 security personnel have died, with thousands arrested amidst a communication blackout that has hampered information verification.

International sanctions on Iran's nuclear program, combined with domestic mismanagement and corruption, have severely impacted the Iranian economy. Demonstrations in Tehran, driven by the soaring inflation and devaluation of the rial, highlight the public's dissent against the regime.

Trump has also suggested that Iranian officials reached out for negotiations, yet hinted at the necessity for U.S. action prior to a potential meeting.