Russia and Ukraine exchanged 230 prisoners of war on Saturday, weeks after Ukraine launched a cross-border attack into the Kursk region of Russia. Kyiv has said one of the goals of the Kursk offensive is to capture Russian soldiers to trade for Ukrainian prisoners of war. Ukraine claims to control over 1,000 sqkm of the Kursk region. Mr Zelensky said that in addition to capturing Russian soldiers, the Kursk operation had other goals he could not disclose. The Ukrainian president said the operation was a preventative strike to deter Russian attacks towards Sumy, a city in Ukraine.