Russia and Ukraine exchanged more than 100 prisoners of war on Saturday as Kyiv marked its third Independence Day since Moscow's full-scale invasion.

Ukraine said the 115 Ukrainian servicemen who were freed were conscripts, many of whom were taken prisoner in the first months of Russia's invasion. Among them are nearly 50 soldiers captured by Russian forces from the Azovstal steelworks in Mariupol.

The Russian Defence Ministry said the 115 Russian soldiers had been captured in the Kursk region, where Ukrainian forces launched their surprise offensive into Russia two weeks ago. The ministry said the soldiers were currently in Belarus, but would be taken to Russia for medical treatment and rehabilitation.

Ukrainian President Volodymyr Zelenskyy said in a post on X that the United Arab Emirates had again brokered the exchange, the 55th since Russia launched a full-scale invasion of its neighbour in February 2022. 

Photos attached to Zelenskyy's post show gaunt servicemen with shaved heads, wrapped in Ukrainian flags. 

"We remember everyone. We are searching for them and making every effort to bring them all back," Zelenskyy said in the post.

Officials from the two sides meet only when they swap their dead and POWs, after lengthy preparation and diplomacy.

Neither Ukraine nor Russia discloses how many POWs there are in total.

According to the UN, most Ukrainian POWs suffer routine medical neglect, severe and systematic mistreatment, and even torture while in detention. There have also been isolated reports of abuse of Russian soldiers, mostly during capture or transit to internment sites.

Last January, Russia and Ukraine exchanged hundreds of prisoners of war in the biggest single release.

WATCH | Ukrainian soldier spoke to Russian POWs: 

Russian POWs say their lack of training helped Ukraine advance

In video from a Ukrainian prison holding Russian soldiers obtained by CBC News, some troops say they were conscripted and received little training before being overrun by Ukrainian forces.

Drone and artillery attacks continue 

Two people were killed and four were wounded, including a baby, when Russian forces shelled the southern Ukrainian city of Kherson, the capital of the partially occupied Kherson region, according to local officials.

Ukraine's air force said it had intercepted and destroyed seven drones over the country's south. Russian long-range bombers also attacked the area of Zmiinyi (Snake) Island with four cruise missiles, while the wider Kherson region was also struck by aerial bombs.

In Russia, the Defence Ministry said Saturday that air defences had shot down seven drones overnight.

Five drones were downed over the southwestern Voronezh region bordering Ukraine, wounding two people, regional Gov. Aleksandr Gusev said. News outlet Astra published videos appearing to show explosions at an ammunition depot after a drone strike. The videos could not be independently verified.

Two people were wounded in a drone attack in the Belgorod region, also bordering Ukraine, regional Gov. Vyacheslav Gladkov said. Local authorities did not report any casualties in the Bryansk region, where the fifth drone was intercepted.

In the Kursk region, regional Gov. Alexei Smirnov said Saturday that three missiles were shot down overnight and another four on Saturday morning.

Russian air defences shot down two more drones on Saturday morning, Russia's Defence Ministry said — one over the Kursk region and one over the Bryansk region.

Independence Day commemorations 

Ukraine marked its 33rd Independence Day Saturday as its war against Russia's aggression reaches a 30-month milestone. No festivities are planned and instead Ukrainians will mark the day with commemorations for civilians and soldiers killed in the war.

Poland's President Andrzej Duda arrived by train early Saturday to Kyiv in a symbolic show of support from one of Ukraine's key allies.

Videos posted by his office show him being greeted by Ukrainian officials and later paying his respects in a ceremony at the Wall of Remembrance of the Fallen for Ukraine.

Canadian Prime Minister Justin Trudeau released a statement Saturday honouring Ukraine's independence.

"Canada was the first Western country to recognize Ukraine's independence. We recognized then what we reaffirm now — that democracy, freedom, and the rule of law must always be upheld," Trudeau said.

"That despots attempting to redraw borders must not prevail. That Ukrainians, and Ukrainians alone, have the right to choose their own future."