Iran began a state funeral service Saturday for around 60 people, including its military commanders, killed in its war with Israel, after Tehran's top diplomat condemned Donald Trump's comments on supreme leader Ayatollah Ali Khamenei as "unacceptable".

Iran on Friday rejected a request by U.N. nuclear watchdog chief Rafael Grossi to visit facilities bombed by Israel and the United States, saying that it suggested "malign intent".

Iran will hold what it described as "historic" funeral proceedings in Tehran on Saturday for 60 killed in its 12-day war with Israel, including top military commanders and nuclear scientists.

The commemorations will begin at 0800 local time (0430 GMT) at Enghelab (Revolution) Square in central Tehran, followed by a funeral procession to Azadi (Freedom) Square, about 11 kilometers (7 miles) away.

The Democratic Republic of Congo and Rwanda are set to sign a peace deal facilitated by the U.S. to help end the decadeslong deadly fighting in eastern Congo.

The deal, to be signed in Washington Friday, would also help the U.S. government and American companies gain access to critical minerals in the conflict-battered, mineral-rich region.

The deep penetrating bombs that the U.S. dropped into two Iranian nuclear facilities were designed specifically for those sites and were the result of more than 15 years of intelligence and weapons design work, the Pentagon's top leaders said Thursday.

Defense Secretary Pete Hegseth and Gen. Dan Caine, chairman of the Joint Chiefs of Staff, said at a press briefing that they are confident the weapons struck exactly as planned.

Iran's top diplomat said the possibility of new negotiations with the United States on his country's nuclear program has been "complicated" by the American attack on three of the sites, which he conceded caused "serious damage."

The U.S. was one of the parties to the 2015 nuclear deal in which Iran agreed to limits on its uranium enrichment program in exchange for sanctions relief and other benefits.

A Russian strike on Friday killed three people and wounded more than a dozen in Ukraine's industrial Dnipropetrovsk region, where Russia has launched increasingly frequent fatal attacks.

"Three people have been killed in an enemy attack. Fourteen people have been wounded," regional governor Sergiy Lysak said of the attack on the town of Samar, outside the region's main city of Dnipro.

Ukrainian forces have halted Russia's recent advance into the northern Sumy region and have stabilized the front line near the border with Russia, Ukraine's top military commander said Thursday.

Col. Gen. Oleksandr Syrskyi, commander in chief of Ukraine's armed forces, said that Ukrainian successes in Sumy have prevented Russia from deploying about 50,000 Russian troops, including elite airborne and marine brigades, to other areas of the front line.

European Union leaders have called for even greater efforts to help meet Ukraine's pressing military needs, and expressed support for the country's quest to join their ranks, but they made little headway with new sanctions against Russia.

At a summit Thursday in Brussels, the leaders said it was important to deliver more "air defense and anti-drone systems, and large-caliber ammunition, to help Ukraine, as it exercises its inherent right to self-defense, to protect its citizens and territory against Russia's intensified daily attacks."

The bombing has quieted in Iran's 12-day conflict with Israel. Now its battered theocracy and 86-year-old Supreme Leader Ayatollah Ali Khamenei must regroup and rebuild in a changed landscape.

Israeli airstrikes decimated the upper ranks of Iran's powerful Revolutionary Guard and depleted its arsenal of ballistic missiles. Israeli missiles and American bunker-buster bombs damaged the nuclear program — though how much remains disputed.