Day 454 of the invasion of Ukraine. Summary of key events in the last 24 hours:

The building of the Russian Federal Security Service in Belgorod was attacked

Kyiv: Russian partisans defy Kremlin in Belgorod region

WSJ: NATO considers a security model for Ukraine similar to Israel's

The building of the Russian Federal Security Service in Belgorod was attacked

The situation remains extremely tense in Russia's Belgorod region, bordering Ukraine, where a Ukrainian sabotage-intelligence group infiltrated yesterday. This was announced by the governor of the district, Vyacheslav Gladkov.

Most of the inhabitants of the Grayvoron district, where the sabotage-reconnaissance group entered, have left it. Points for temporary accommodation are organized on the territory of the district. Today's celebrations on the occasion of the end of the school year will take place in an online format, Gladkov pointed out and described the current situation as follows.

"Eight people were injured. According to information from the Ministry of Health and the Ministry of Defense, there were no casualties among civilians. The situation remains tense enough. A counter-terrorist operation regime has been introduced."

Yesterday it became clear that the Ukrainian saboteurs are actually fighters of two armed formations of Russians fighting on the side of Ukraine. These are the so-called Russian Volunteer Corps and Legion "Freedom for Russia". According to Kremlin spokesman Dmitry Peskov, the purpose of the sabotage is to reduce the political effect of the loss of Bakhmut for the Ukrainian side.

Meanwhile, the Ukrainian agency UNIAN reported an attack on the building of the Russian Federal Security Service in Belgorod.

Photos and video in a Russian online publication showed smoke rising over the city. A loud explosion was reported in the city center and police and firefighters arrived at the scene.

Due to the introduced anti-terrorist operation regime in the region, publications without reference to official sources are prohibited, UNIAN informs.

Kyiv: Russian partisans defy Kremlin in Belgorod region

The situation in Russia's Belgorod region, which borders Ukraine, remains unclear. The governor of the district, Vyacheslav Gladkov, claims that a Ukrainian subversive-intelligence group has penetrated there.

And according to Kyiv, Russian partisans oppose the Kremlin. At the same time, in anticipation of the Ukrainian counteroffensive, Russia has again stepped up its missile strikes.

Regional authorities announced late last night that a Ukrainian sabotage and intelligence group had infiltrated there. Kyiv denies and claims that it is an operation by opponents of the regime in the Kremlin. The region is in the mode of an anti-terrorist operation, announced the governor Vyacheslav Gladkov.

Last night, Russia struck targets in Ukraine with Iranian Shahed drones. All drones were shot down by air defenses, said the morning briefing of the General Staff of the Ukrainian Army.

According to Kyiv, the battle for Bakhmut continues, fierce fighting is also taking place in the Mariinka region, in the Donetsk region, where Russia continues to focus its efforts. Kyiv also reported attacks on targets in Dnipro, where 7 people were injured.

WSJ: NATO considers a security model for Ukraine similar to Israel's

As Ukraine enters a crucial phase of its war with Russia, US and NATO leaders are rallying around strengthening Kyiv’s defenses and seeking to secure the country's sovereign future. This is a security model that Western leaders, including US President Joe Biden, compare with the Israeli model, writes the Wall Street Journal, quoted by the UNIAN and BTA agencies.

The publication notes that after several months of war, the stubborn battle for Bakhmut has taken center stage. After the almost completely destroyed Ukrainian city fell into the hands of the Russian private military company "Wagner" last weekend, a more serious task turned into the center of attention: how to turn Ukraine into a bastion against Russian aggression.

Polish President Andrzej Duda said in an interview with the "Wall Street Journal" that the agreement on the security of Ukraine on the Israeli model would prioritize the supply of weapons and modern technology. According to Western officials familiar with the progress of the negotiations, this security agreement will be linked to the process of moving towards Ukraine's future membership in NATO, but will not lead to a de facto turn of the pact towards any conflict with Russia.

"The discussion of this issue continues even now," said Duda, who has been one of the most ardent supporters of Ukraine and its efforts to cover the Russian invasion.

Duda did not specify what weapons or technology could be transferred to Ukraine under the agreement, but Poland has already supplied Kyiv with Soviet MiG-29 fighter jets, in addition to other military equipment, UNIAN said.

Last week, Biden told his G7 colleagues that the United States would support training Ukrainian pilots to use F-16 fighter jets, an important step toward providing US-made fighter jets to Ukraine.

However, Russia's Deputy Foreign Minister Alexander Grushko warned on Saturday that sending F-16 jets to Ukraine would escalate the conflict.

"We see that Western countries continue to adhere to the scenario of escalation, which carries huge risks for them," he said, quoted by TASS.

Given that Ukraine's NATO membership is likely to be several years away, a series of binding security agreements would become a way to immediately help the Ukrainian military as it prepares for an expected counteroffensive aimed at pushing Russia out of the territories, on which Moscow has claims after the start of the Russian invasion in 2022, UNIAN points out.

The impetus for the security agreement was the West's desire to increase its support for Kyiv, including providing tanks, advanced American and German-made air defense systems, and also increasing the production of shells and ammunition needed by Ukraine.

According to Duda, Biden, who visited Poland in February, discussed the concept of the Israeli model. This concept is currently being actively discussed among Western allies within the agenda of the NATO Summit in Vilnius. The security agreement based on the proposal, known as the Kyiv Security Agreement, is expected to be signed after the pact's summit, officials familiar with the progress of the negotiations said.

A US government official said the discussion of the Israeli model comes as a way to address Ukraine's core security concerns, and acknowledged that Kiev will not soon gain NATO membership. However, even if the decision is broadly based on the Israeli security model, the framework of the defense agreement with Ukraine remains fluid, the official added.

"We are still discussing with Ukraine, our allies and partners, what the model will look like," said the American representative.

Israel is not a member of NATO and the US is under no obligation to come to the country's aid. For decades, however, Israel has had a special relationship with the United States because it is Washington's closest partner in the Middle East and is also the largest recipient of American aid since World War II, UNIAN notes.

US aid to Israel is currently governed by 10-year agreements, the latest of which commits Washington to billion in military aid annually between 2019 and 2028.

Such an agreement with Ukraine could change the course of its conflict with Russia, say Western representatives, quoted by UNIAN.

"Today, Russia must understand that Ukraine has received these security guarantees and that they will not disappear with time, nor because of Western fatigue," Duda said, noting that this proposal would not be linked to any peace process, nor with negotiations between Kyiv and Moscow.

The Kremlin announced in 2021 that Ukraine's entry into NATO would be a "red line" for Russia. Ukraine did not become a member of the pact, but Moscow nevertheless launched its invasion, UNIAN points out.

Ukrainian President Volodymyr Zelensky has repeatedly stated that Ukraine's goal is to regain all lands conquered by Russia since 2014, including Crimea. He rejected the idea of a ceasefire with Russia and said any pause in fighting would allow Moscow's depleted forces to regroup and launch new attacks in the future.

The concept of the Israeli model was first developed by Andriy Yermak, the Ukrainian president's chief of staff, and Anders Fogh Rasmussen, a former NATO secretary general, people familiar with its origins said.

"Ukraine needs iron and solid security guarantees," Yermak told the Wall Street Journal. He added that such guarantees should be valid until his country joins NATO.

Zelensky will attend a NATO summit in Lithuania, where the pact is expected to create a new body known as the Ukrainian NATO Council to serve as a gateway to future membership, several European and NATO officials said. According to them, Ukraine will have the right to call meetings of the council and apply for assistance, which will then be provided by individual member states.

The US will play the role of chief guarantor of security measures involving European NATO member states, said Fabrice Pothier, former head of NATO's political planning division and an aide to Rasmussen, who helped draft the proposal and presented it to the governments of several Western countries, UNIAN points out.