The human cost of the invasion has been starkly shown in images emerging from Ukraine's cities.
People's homes have been damaged, while many have been forced into subways that are doubling up as bomb shelters.
These are some of the images from Ukraine.
Image:
Natali Sevriukova stands next to her house following a rocket attack in the city of Kyiv
Image:
A Ukrainian Army soldier inspects fragments of a downed aircraft in Kyiv
Image:
People gather in a metro station, which they use as an air raid shelter, in Kharkiv
Image:
Ukrainian soldiers take positions in downtown Kyiv
Image:
A man walks around the wreckage of an unidentified aircraft that crashed into a house in Kyiv
Image:
Ukrainian servicemen stand guard next to a destroyed armoured vehicle on the outskirts of Kharkiv
Image:
Ukrainian servicemen stand guard on a road in Kharkiv
Image:
The wreckage of an unidentified aircraft that crashed into a house in Kyiv
Image:
People gather in an air raid shelter in Kyiv
Image:
People use electronic devices in an air raid shelter
Image:
Tanks, believed to be Russian, are seen crossing into a southern Ukrainian province
Image:
Servicemen of the Ukrainian National Guard take positions in central Kyiv
Image:
A child sits on a swing in front of a damaged building in Kyiv
Image:
A toy is seen inside a damaged building
Image:
A person walks his dog in front of a damaged building
Image:
Interior of a damaged residential building in Kyiv
Image:
An unidentified military truck at a residential area in Kyiv
Image:
A man holding a child reacts as they arrive from Ukraine to Slovakia
