Russian forces held a live-fire exercise in the Black Sea on Friday, and also struck granaries in Ukraine's port region of Odessa, ramping up tensions days after Moscow pulled out of a U.N.-backed grain export deal.

The Kremlin's withdrawal from the agreement has suspended the flow of shipments via Black Sea routes from Ukraine, a major grain exporter, and raised fears for global food supplies. Russian missiles have pounded Ukrainian port cities this week, as Moscow and Kyiv issue warnings to ships in the Black Sea.

The U.N. Security Council is meeting Friday to discuss the humanitarian impact of Russia's pullout from the grain deal, reached last year to alleviate a food security crisis in developing countries.

At the meeting, the United States warned that Russia could be planning to attack Black Sea shipping routes.

"The United States has information that the Russian military may expand its targeting of Ukrainian grain facilities to include attacks against civilian shipping," said Linda Thomas-Greenfield, the U.S. ambassador to the United Nations. "Our information also indicates that Russia laid additional sea mines in the approaches to Ukrainian ports. We believe this is a coordinated effort to justify any attacks against civilian ships in the Black Sea and lay blame on Ukraine for these attacks."

Ukrainian President Volodymyr Zelensky said he planned to speak with Turkish President Recep Tayyip Erdogan on Friday evening about subjects including the Black Sea and food security.

Here's the latest on the war and its ripple effects across the globe:

Key updates:

- Russia struck an agricultural facility in Odessa in the fourth day of pounding the port region, the Odessa governor said. The attack injured two employees and destroyed tons of peas and barley, Oleh Kiper added. The wave of attacks also comes after Moscow promised to retaliate for Kyiv's strike on the Crimean Bridge earlier this week.

- Two children were killed in a Russian artillery strike on a village in the Donetsk region: a boy born in 2013 and a girl born in 2007. In a statement on his website, Zelensky offered his condolences to the family and friends of the deceased.

- Russian authorities detained Igor Girkin, a former Russian commander in Ukraine and prominent war blogger, on Friday. The charge - reportedly "public calls for extremist activities" online - likely stems from Girkin's loud criticism of Russian leaders and their military strategy, and comes despite his otherwise-fervent support of the war in Ukraine.

- The CIA director suggested that Putin could still seek revenge on Wagner Group chief Yevgeniy Prigozhin over his short-lived mutiny. William J. Burns also commented on Russian Gen. Sergei Surovikin, who had good relations with the Wagner boss and whose whereabouts sparked rumors last month. "I don't think he enjoys a lot of freedom right now," Burns told NPR's Mary Louise Kelly at the Aspen Security Forum, stopping short of saying Surovikin was in custody. Prigozhin appears to have accepted exile in Belarus, brokered by Lukashenko.

- Tensions around maritime activity are simmering and the price of wheat futures has risen, though it has not reached its May 2022 high. Russia has said it considers ships en route to Ukrainian Black Sea ports to be involved in the conflict as of Thursday, and Ukraine responded that it would treat vessels headed toward Russian ports the same.

- National Security Council spokesman John Kirby said Kyiv's use of cluster munitions weapons was "actually having an impact on Russia's defensive formations" and Ukrainian forces were using them "effectively," though the decision to send the widely banned munitions has met criticism from human rights groups. He made the comments after The Washington Post reported that Ukraine began using the U.S.-provided munitions in a bid to push through Russian lines in the southeast.

- Zelensky called for limits on funding cultural activities during the war in his nightly address. The cultural minister, Oleksandr Tkachenko, announced his resignation, citing a "misunderstanding about the importance of culture during war" with the president. "Museums, cultural centers, symbols, TV series - all of this is important," Zelensky said, "but now there are other priorities."

Global impact

- A Russian naval ship fired cruise missiles at a target vessel and destroyed it as part of a Black Sea drill, the Defense Ministry said Friday. Russian warships and planes also practiced sealing off areas temporarily closed to shipments and seizing ships, it said.

- The UK lifted sanctions on Oleg Tinkov, the former oligarch who founded Russia's Tinkoff Bank but renounced his Russian citizenship months after the country's invasion of Ukraine. "He spoke out against the war unambiguously, and this shows others in his position that they can do the same to potentially have sanctions lifted," wrote Mikhail Khodorkovsky, the exiled Russian oligarch, in support of the decision on Twitter.

- Russian President Vladimir Putin is set to meet with Belarusian President Alexander Lukashenko on July 23 while Lukashenko is on a working visit to Russia, the Kremlin's press service said Friday. Putin and Lukashenko "will continue to discuss relevant aspects of continued development of Russian-Belarusian relations of allied strategic partnership, as well as integration interaction within the Union State."

- Poland plans to move military formations from the west to the east of the country, citing the presence of the Wagner Group in neighboring Belarus, according to Polish national news agency PAP. "Training or joint exercises between the Belarusian army and the Wagner Group is undoubtedly a provocation," it quoted the secretary of Poland's security committee as saying.

- Russia's deputy defense minister held talks with his Iranian counterpart on military cooperation and exchanged "views on regional security and the international situation," the Russian Defense Ministry said Friday.

From our correspondents

Ukraine begins firing U.S.-provided cluster munitions at Russian forces: Ukrainian officials have said these munitions would make up for their disadvantage on the battlefield, although the cluster bombs are outlawed in more than 120 countries because of the threat to civilians, John Hudson and Isabelle Khurshudyan report.

Cluster munitions explode in the air over a target, dispersing smaller bomblets across a wide area. The submunitions can fail to explode on impact, potentially killing or injuring people long after a conflict ends.

Most of Washington's NATO allies are signatories to the Convention on Cluster Munitions, which bans their use and production, but the United States, Russia and Ukraine never signed it.

Putin has recently threatened to retaliate against Ukraine's use of cluster munitions with its own supply "if they are used against us," although the United Nations said last year that Russia had already used them in Ukraine at least 24 times in the first month of the war.

Mary Ilyushina, Shane Harris, Matt Viser, Robyn Dixon and Natalia Abbakumova contributed to this report.

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