Activists take part in a rally supporting protesters in Iran at Lafayette Park, across from the White House, in Washington, Sunday.(AP Photo/Jose Luis Magana)

WASHINGTON (AP) — U.S. President Donald Trump said Iran wants to negotiate with Washington after his threat to strike the Islamic Republic over its crackdown on protesters in nationwide demonstrations that activists said Monday had left at least 599 people dead.

Iran had no direct reaction to Trump’s comments, which came after the foreign minister of Oman — long an interlocutor between Washington and Tehran — traveled to Iran this weekend. It also remains unclear just what Iran could promise, particularly as Trump has set strict demands over its nuclear program and its ballistic missile arsenal, which Tehran insists is crucial for its national defense.

Iranian Foreign Minister Abbas Araghchi, speaking to foreign diplomats in Tehran, insisted “the situation has come under total control” in remarks that blamed Israel and the U.S. for the violence, without offering evidence.

“That’s why the demonstrations turned violent and bloody to give an excuse to the American president to intervene,” Araghchi said, in comments carried by Al Jazeera. The Qatar-funded network has been allowed to report live from inside Iran, despite the internet being shut off.

However, Araghchi said Iran was “open to diplomacy.” Iranian Foreign Ministry spokesman Esmail Baghaei said that a channel to the U.S. remained open, but talks needed to be “based on the acceptance of mutual interests and concerns, not a negotiation that is one-sided, unilateral and based on dictation.”

Meanwhile, pro-government demonstrators flooded the streets Monday in support of the theocracy, a show of force after days of protests directly challenging the rule of 86-year-old Supreme Leader Ayatollah Ali Khamenei. Iranian state television aired chants from the crowd, which appeared to number in the tens of thousands, who shouted “Death to America!” and “Death to Israel!”

Others cried out, “Death to the enemies of God!” Iran’s attorney general has warned that anyone taking part in protests will be considered an “enemy of God,” a death-penalty charge.

White House press secretary Karoline Leavitt said Iran’s public rhetoric diverges from the private messaging the administration has received from Tehran in recent days.

“I think the president has an interest in exploring those messages,” Leavitt said. “However, with that said, the president has shown he’s unafraid to use military options if and when he deems necessary, and nobody knows that better than Iran.”

Trump acknowledges proposal for talks

Trump and his national security team have been weighing a range of potential responses against Iran, including cyberattacks and direct strikes by the U.S. or Israel, according to two people familiar with internal White House discussions who weren’t authorized to comment publicly and spoke on condition of anonymity.

“The military is looking at it, and we’re looking at some very strong options,” Trump told reporters on Air Force One on Sunday night. Asked about Iran’s threats of retaliation, he said, “If they do that, we will hit them at levels that they’ve never been hit before.”

Meanwhile, Trump announced Monday that countries doing business with Iran will face 25% tariffs from the United States. Trump announced the tariffs in a social media posting, saying they would be “effective immediately.”

It was action against Iran for the protest crackdown from Trump, who believes exacting tariffs can be a useful tool in prodding friends and foes on the global stage to bend to his will.

Brazil, China, Turkey, the United Arab Emirates and Russia are among economies that do business with Tehran.

The White House declined to offer further comment about the president’s tariff announcement.

Trump said Sunday that his administration was in talks to set up a meeting with Tehran, but cautioned that he may have to act first as reports of the death toll in Iran mount and the government continues to arrest protesters.

“I think they’re tired of being beat up by the United States,” Trump said. “Iran wants to negotiate.”

Iran, through the country’s parliamentary speaker, warned Sunday that the U.S. military and Israel would be “legitimate targets” if Washington uses force to protect demonstrators.

More than 10,600 people also have been detained over the two weeks of protests, said the U.S.-based Human Rights Activists News Agency, which has been accurate in previous unrest in recent years and gave the death toll. It relies on supporters in Iran crosschecking information. It said 510 of the dead were protesters and 89 were security force members.

With the internet down in Iran and phone lines cut off, gauging the demonstrations from abroad has grown more difficult. The Associated Press has been unable to independently assess the toll. Iran’s government hasn’t offered overall casualty figures.