U.S. President Donald Trump on Tuesday said Iranians should continue nationwide protests and take over the country's institutions as authorities there cracked down on mass demonstrations.

"Iranian Patriots, KEEP PROTESTING - TAKE OVER YOUR INSTITUTIONS!!!" Trump wrote on his Truth Social platform.

Greenland's prime minister said Tuesday that the autonomous territory would choose to remain Danish rather than become part of the United States, following U.S. President Donald Trump's threats to take over the Arctic island.

"We are now facing a geopolitical crisis, and if we have to choose between the United States and Denmark here and now, we choose Denmark," Greenlandic Prime Minister Jens-Frederik Nielsen told a press conference in Copenhagen.

Iranians have found themselves without email, texts and foreign apps for days, with even landline phone calls unreliable under a digital blackout imposed by authorities in the face of widespread protests.

President Donald Trump touted "low" U.S. inflation numbers Tuesday, taking aim at the central bank chief for being "too late" to slash interest rates and urging further rate cuts to boost the economy.

The World Health Organization chief warned Tuesday that Washington's decision to withdraw from the U.N. health agency was dangerous for the United States and the rest of the world alike.

France's Foreign Minister Jean-Noel Barrot said Tuesday he had summoned the Iranian ambassador to object to what he described as "state violence unquestioningly unleashed on peaceful protesters" in Iran.

U.S. President Donald Trump's administration has made good on its pledge to label three Middle Eastern branches of the Muslim Brotherhood as "terrorist" organizations, imposing sanctions on them and their members in a decision that could have implications for U.S. relationships with allies Qatar and Turkey.

The Treasury and State departments announced the actions Tuesday against the Lebanese, Jordanian and Egyptian chapters of the Muslim Brotherhood, which they said pose a risk to the United States and American interests.

The United Nations Interim Force in Lebanon said an Israeli tank fired near its peacekeepers on Monday, and warned that such attacks were becoming "disturbingly common".

UNIFIL has repeatedly reported Israeli fire near or towards its personnel in recent months, and less than two weeks ago said gunfire from an Israeli position hit close to peacekeepers twice.

Syria's army told Kurdish forces on Tuesday to withdraw from an area they control east of Aleppo after dislodging fighters from two neighbourhoods in the city in deadly clashes last week.

U.S. President Donald Trump announced a 25-percent tariff on any country doing business with Iran, ramping up pressure as a rights group estimated a crackdown on protests has killed at least 648 people.