This selection of photographs shows some of the most crucial moments of the ongoing war in Ukraine 100 days after the conflict began.
From the shock of Russia's invasion back in February to the latest battle for eastern Ukraine, many of these photos show the extent of the war's brutality.
They have also played a role in the west's support for Ukraine as well as the ongoing efforts to hold those responsible for the war's atrocities accountable.
First images emerge after Russia invades Ukraine
Dangerous evacuations from Kyiv suburbs, Russian army targeting civilians
Nights in the basements, Kyiv and Kharkiv residents taking shelter in the metro
Separated families as millions of Ukrainians leave the country, mostly women and children
Massive destruction in Kyiv and Kharkiv
Civilians mobilise while life continues on during war
Warning: The next images may be disturbing to some viewers
Russian missile strike hits Kramatorsk railway station as civilians evacuate
Attacks on a maternity hospital and the drama theatre serving as a shelter in Mariupol
Liberated suburbs of Kyiv, the evidence of atrocities
Beseiged defenders of Mariupol at Azovstal steelworks
Russia shifting its forces from the north of Ukraine back to its east
Since the beginning of the war, 32 journalists were killed in Ukraine, a number that does not include media employees who enlisted in the army to defend Ukraine.
Meanwhile, Amnesty International said in early May that it has documented extensive war crimes by Russian forces in communities around the Ukrainian capital, Kyiv, including arbitrary executions, bombings of residences and torture.