(Reuters) -U.S. President Donald Trump said on Sunday there is "a real chance for greatness in the Middle East" without providing specific details or timetable, days after saying he was close to forging a deal to end the war in Gaza.

"We have a real chance for Greatness in the Middle East. All are on board for something special, first time ever. We will get it done," he said in a Truth Social post.

Trump will meet Israeli Prime Minister Benjamin Netanyahu on Monday at the White House with the aim of reaching a framework for a deal, according to administration officials.

As United Nations sanctions returned in full force on Sunday, Iranians felt the strain deepen, with prices soaring and the rial sinking to new lows.

For Helia, a 33-year-old graphic designer in Tehran, the impact was already visible: the price tag on the furniture for her new home jumped higher within three days.

"Even before the dollar went up, prices were rising. From meat to taxis, life is already harder," she told AFP while working on an advertising project.

By Nidal al-Mughrabi

CAIRO (Reuters) -Israeli tanks moved deeper into Gaza City's residential districts on Sunday, as local health authorities said they have been unable to respond to dozens of desperate calls, expressing concern about the fate of residents in the targeted areas.

Witnesses and medics said Israeli tanks had deepened their incursions in the Sabra, Tel Al-Hawa, Sheikh Radwan and Al-Naser neighborhoods, closing in on the heart and the western areas of Gaza City, where hundreds of thousands of people are sheltering.

Iran on Sunday condemned as "unjustifiable" the reinstatement of United Nations sanctions over its nuclear programme, after the collapse of talks with Western powers and Israeli and US strikes on its nuclear sites.

The measures, which bar dealings linked to the Islamic republic's nuclear and ballistic missile activities, took effect overnight after Western powers triggered the so-called "snapback" mechanism under the 2015 nuclear accord.

By Parisa Hafezi and John Irish

UNITED NATIONS (Reuters) -Iran’s clerical rulers face one of their gravest crises since the 1979 Islamic Revolution, caught between growing discontent at home and a stalled nuclear deal that together have left the country more isolated and divided.

The United Nations reimposed sanctions on Iran on Saturday after last-ditch talks between Tehran and European powers Britain, France and Germany failed to resolve the latest of decades of standoffs over Iran's nuclear program.

By Parisa Hafezi, John Irish and Francois Murphy

UNITED NATIONS/VIENNA (Reuters) -The "snapback" re-imposition of U.N. sanctions on Iran lifted under a 2015 nuclear deal sends Western powers back to the drawing board on how to contain and monitor Iran's nuclear programme, diplomats and analysts say.

Tens of thousands of demonstrators marched through the streets of the German capital on Saturday to demand that Israel halt its military campaign in Gaza.

Large crowds waved Palestinian flags and banners reading "Free Palestine" and "Food and water are human rights" as they marched from Berlin's town hall.

"Today we can send a signal that the majority, who are against Israel's policies and against this genocide, are visible on the streets and can take action," Dustin Hirschfeld, who took part in the "Together for Gaza" demonstration, told AFP.

Hezbollah chief Naim Qassem said the group would not allow itself to be disarmed on Saturday as he addressed supporters marking one year since the killing by Israel of his predecessor Hassan Nasrallah.

The charismatic leader was killed in an Israeli air strike on the southern suburbs of Beirut on September 27, 2024.

Without Nasrallah and with much of its military capability destroyed by Israel, Hezbollah's grip on Lebanese politics has weakened, and Beirut has ordered the army to disarm the group.

By Tom Balmforth and Michelle Nichols

UNITED NATIONS (Reuters) -Russia's Foreign Minister Sergei Lavrov warned NATO and the European Union on Saturday that "any aggression against my country will be met with a decisive response."

As Russia's war rages in Ukraine, tensions have mounted along NATO's eastern flank in recent weeks as Estonia has accused Moscow of sending three fighter jets into its airspace and NATO jets shot down Russian drones in Polish airspace.

BOGOTA (Reuters) -Colombian President Gustavo Petro on Saturday dismissed the U.S. decision to revoke his visa and accused Washington of violating international law over his criticism of Israel's actions in Gaza.

The U.S. said on Friday it would revoke Petro's visa after he took to New York's streets on Friday to join a pro-Palestinian demonstration and urged U.S. soldiers to disobey President Donald Trump's orders.