In pictures: 1,000 days of war in Ukraine

People wait in a traffic jam as they leave the city of Kharkiv, February 24, 2022. REUTERS/Antonio Bronic

Servicemen of the Ukrainian National Guard take positions in central Kyiv as Russian forces advanced toward the capital, February 25, 2022. REUTERS/Gleb Garanich

Smoke and flames rise over during the shelling near Kyiv, February 26, 2022. REUTERS/Gleb Garanich

People take cover as an air-raid siren sounds in Kyiv

People take cover as an air-raid siren sounds, near an apartment building damaged by recent shelling in Kyiv, February 26, 2022. REUTERS/Gleb Garanich

Russian military operation against Ukraine continues

Ukrainian servicemen walk by a damaged vehicle, at the site of fighting with Russian troops, in Kyiv, February 26, 2022. REUTERS/Valentyn Ogirenko

Civilians train to throw Molotov cocktails in Zhytomyr

A civilian trains to throw Molotov cocktails to defend the city, in Zhytomyr, Ukraine, March 1, 2022. REUTERS/Viacheslav Ratynskyi

Local residents look for cover in Irpin, after heavy shelling while Russian troops advance towards capital

Local residents look for cover as they escape from the town of Irpin, after heavy shelling on the only escape route used by locals, while Russian troops advance towards the capital of Kyiv, in Irpin, near Kyiv, Ukraine March 6, 2022. REUTERS/Carlos Barria

Ukrainian Army soldiers farewell their loved ones at train station in Lviv

Olga hugs her boyfriend Vlodomyr as they say goodbye prior to Vlodomyr’s deployment closer to the front line, at the train station in Lviv, Ukraine, March 9, 2022. REUTERS/Kai Pfaffenbach

Russia's invasion of Ukraine continues, near Demydiv

A Ukrainian soldier hides from a helicopter airstrike near Demydiv, Ukraine, March 10, 2022. REUTERS/Maksim Levin

Ukrainian soldiers walk past a monument of the city founder Duke de Richelieu, covered with sand bags for protection, amid Russia's invasion of Ukraine, in Odessa

Ukrainian soldiers walk past a monument of the city founder Duke de Richelieu, covered with sand bags for protection in Odessa, Ukraine, March 10, 2022. REUTERS/Alexandros Avramidis