Russia and Ukraine completed a prisoner-of-war exchange involving 205 individuals on Friday, just hours after rescuers finished combing through the wreckage of a Kyiv apartment block where 24 people died, including three girls.

President Zelensky stated that most of the Ukrainian captives had been detained since 2022.

The exchange formed part of a temporary ceasefire that wrapped up this week, swiftly replaced by sweeping Russian attacks across Ukraine, highlighted by a missile strike that left 18 apartments in ruins. Among those killed was 12-year-old Lyubava Yakovleva, whose father perished earlier in the conflict.

Russian authorities reported four deaths, including a child, from Ukrainian drone strikes on the city of Ryazan, southeast of Moscow.

Social media footage revealed destruction to two apartment buildings, which Ryazan Governor Pavel Malkov attributed to falling debris.

Twenty-eight individuals suffered injuries in the incident. Ukraine's drone operations chief claimed responsibility for striking Ryazan's major oil refinery.

In Kyiv's Darnytskyi district, emergency teams wrapped up a 28-hour search through the debris of a collapsed nine-story residential building on Friday, as locals and troops anxiously awaited updates on loved ones.

The capital observed a day of mourning Friday for the 24 strike victims.

Nova Poshta postal workers announced the deaths of two employees named Dmytro, one alongside his spouse. Victims also included ex-hockey player Yuriy Orlov and his 24-year-old partner Maryna Homeniuk, an English instructor, plus kindergarten teacher Svitlana Moskalishyna.

The three deceased girls were aged 12, 15, and 15.

Lyubava Yakovleva's older sister was first listed as missing amid the rubble before confirmation of her death. Their school posted on Facebook that war's "most terrifying aspect is the innocent children's lives it claims."

Volodymyr Zelensky joined others in laying flowers at the site, urging global pressure on Russia for "intentionally shattering lives while evading accountability."

The Ukrainian president identified the weapon as a Russian X-101 cruise missile that virtually flattened the structure.

Thursday's strike obliterated most of the 18 affected units - many one-room dwellings or sections of larger homes - while an entire entrance lay buried in rubble.

Prime Minister Yulia Svyrydenko commended rescuers for rescuing 30 survivors.

Eighteen-year-old Ivan, among the initial responders alongside his father, aided in victim extractions.

"Flames raged and smoke filled the air," the youth recounted to Suspilne public broadcaster. "I assisted a policeman in safely lowering a mobility-impaired woman; he carried her down since she couldn't walk."

Zelensky highlighted the missile's recent manufacture, noting Russia's ongoing evasion of sanctions to acquire production components, resources, and machinery via social media.

He honored the 205 Ukrainians freed in the initial phase of a 1,000-per-side swap.

Facilitated by the United States and United Arab Emirates, the deal saw Russia's defense ministry report 205 Russians transferred to Belarus for medical and psychological care.

Freed Ukrainians included defenders from Mariupol's early siege, border areas, and the Chornobyl nuclear facility during Russia's 2022 full-scale invasion.

The swap tied into a three-day truce from May 9-11, aligned with Russia's subdued Moscow Victory Day parade.

Plagued by breaches, the pause dissolved amid Russia's largest drone barrage since the war's outset.

Officials tallied 1,410 Russian drones and 56 missiles targeting Ukrainian areas in a single 24-hour span from May 13-14.

Despite President Putin's recent claim that the war nears conclusion, negotiations have stalled since February with no evident breakthroughs.

Analysts posit Russia's intensified strikes synced with US President Trump's Beijing visit for discussions with Xi Jinping. Zelensky charged Moscow with sabotaging the diplomatic climate.

The Kremlin indicated Putin plans a prompt trip to meet Xi post-Trump talks.

Spokesman Dmitry Peskov outlined focuses on bilateral relations and global issues.